Submitted URL: http://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Effective URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Submission: On August 24 via manual from IT — Scanned from NL

Summary

This website contacted 3 IPs in 1 countries across 5 domains to perform 8 HTTP transactions. The main IP is 2a06:98c1:3120::3, located in United States and belongs to CLOUDFLARENET, US. The main domain is adzblockersentinel.net.
TLS certificate: Issued by GTS CA 1P5 on July 31st 2023. Valid for: 3 months.
This is the only time adzblockersentinel.net was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
1 7 2a06:98c1:312... 13335 (CLOUDFLAR...)
1 2606:4700::68... 13335 (CLOUDFLAR...)
8 3
Apex Domain
Subdomains
Transfer
5 adzblockersentinel.net
adzblockersentinel.net
30 KB
1 adblockersentinel.com
adblockersentinel.com — Cisco Umbrella Rank: 843001
557 B
1 alumbroso.info
alumbroso.info
1 KB
1 jsdelivr.net
cdn.jsdelivr.net — Cisco Umbrella Rank: 334
29 KB
0 Failed
function sub() { [native code] }. Failed
8 5
Domain Requested by
5 adzblockersentinel.net 1 redirects adzblockersentinel.net
1 adblockersentinel.com adzblockersentinel.net
1 alumbroso.info adzblockersentinel.net
1 cdn.jsdelivr.net adzblockersentinel.net
0 icngebmpnhfbjilmgbdfjbfdhcnocjac Failed adzblockersentinel.net
8 5

This site contains no links.

Subject Issuer Validity Valid
adzblockersentinel.net
GTS CA 1P5
2023-07-31 -
2023-10-29
3 months crt.sh
sni.cloudflaressl.com
Cloudflare Inc ECC CA-3
2023-05-02 -
2024-05-01
a year crt.sh
alumbroso.info
GTS CA 1P5
2023-08-23 -
2023-11-21
3 months crt.sh

This page contains 3 frames:

Primary Page: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Frame ID: 678E1A47454154C91A4116B3BDEF2E81
Requests: 6 HTTP requests in this frame

Frame: https://alumbroso.info/a.php?id=0066&e=VPGCNBK0FG&c=brkv369Z3Yppi&r=kv&cid=7c09a58024ef482da2564767063fdfd9&z=4412&v=3&dr=&inw=1600&inh=1200
Frame ID: 4CD94217226F318FC8406B544931DB3F
Requests: 1 HTTP requests in this frame

Frame: https://adblockersentinel.com/vb.php
Frame ID: 7BACBA2C45F713D4B1ACF7DF45C024CF
Requests: 1 HTTP requests in this frame

Screenshot

Page Title

AdBlocker Sentinel

Page URL History Show full URLs

  1. http://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd... HTTP 301
    https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd... Page URL

Detected technologies

Overall confidence: 100%
Detected patterns
  • \.php(?:$|\?)

Overall confidence: 100%
Detected patterns
  • <link[^>]* href=[^>]*?bootstrap(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)[^>]*?(?:\.min)?\.css
  • bootstrap(?:[^>]*?([0-9a-fA-F]{7,40}|[\d]+(?:.[\d]+(?:.[\d]+)?)?)|)[^>]*?(?:\.min)?\.js

Overall confidence: 100%
Detected patterns
  • <link [^>]*?href="?[a-zA-Z]*?:?//cdn\.jsdelivr\.net/
  • //cdn\.jsdelivr\.net/

Page Statistics

8
Requests

88 %
HTTPS

100 %
IPv6

5
Domains

5
Subdomains

3
IPs

1
Countries

60 kB
Transfer

229 kB
Size

7
Cookies

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

  1. http://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv HTTP 301
    https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

8 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request sentinel.php
adzblockersentinel.net/
Redirect Chain
  • http://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
  • https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
16 KB
6 KB
Document
General
Full URL
https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
345939f9b10d663ce65ed85e45257ecd08699b354340acee7f78e2d3c0df06d9

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36
accept-language
nl-NL,nl;q=0.9

Response headers

alt-svc
h3=":443"; ma=86400
cf-cache-status
DYNAMIC
cf-ray
7fbaa9815d9206c0-AMS
content-encoding
br
content-type
text/html; charset=UTF-8
date
Thu, 24 Aug 2023 09:45:23 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=mw%2BbcosWzxTe%2Fog3hoqOspSxtdqakjnewOWKHANee9H4Wa1pNtyjZghelDHvbSxEuAeW8eP05dm3iJa0k9Tbb0G0oVSvNEWxTXWfUxAGooYlVelwl6r8HDqtvnyQPDZCBRxBL%2FZbbEt%2B0b4lZRt%2BuotjxsLr"}],"group":"cf-nel","max_age":604800}
server
cloudflare

Redirect headers

CF-Cache-Status
DYNAMIC
CF-RAY
7fbaa980aadc0b5f-AMS
Connection
keep-alive
Content-Type
text/html
Date
Thu, 24 Aug 2023 09:45:23 GMT
Location
https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
NEL
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Report-To
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=izbhPClomvaiGMA0v4j3bZnqnUcThHYjI01KxAZFU5OiRHDpy2SCJPQu7thz9NAFUMiKDIKCbzOzlpCldmB33gezcpnyuEe8XAzEEYEs4yy1Q4ta8EKX1pYfWTBz%2B4egKAdAJwdOw80NfNESJsPE2upqE0t7"}],"group":"cf-nel","max_age":604800}
Server
cloudflare
Transfer-Encoding
chunked
alt-svc
h3=":443"; ma=86400
bootstrap.min.css
cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/
190 KB
29 KB
Stylesheet
General
Full URL
https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css
Requested by
Host: adzblockersentinel.net
URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:4700::6810:5914 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
c0bcf7898fdc3b87babca678cd19a8e3ef570e931c80a3afbffcc453738c951a
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains; preload
X-Content-Type-Options nosniff

Request headers

Referer
https://adzblockersentinel.net/
Origin
https://adzblockersentinel.net
accept-language
nl-NL,nl;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36

Response headers

date
Thu, 24 Aug 2023 09:45:23 GMT
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-content-type-options
nosniff
cf-cache-status
HIT
nel
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
age
15815475
x-jsd-version
5.2.3
content-encoding
br
x-cache
HIT, HIT
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=86400
x-served-by
cache-fra-eddf8230122-FRA, cache-yyz4522-YYZ
x-jsd-version-type
version
server
cloudflare
etag
W/"2f955-d5HdHzFzoNYsw5wh0q1x/I2tDnI"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=tZ6eIOMgB81tPlnBD1jfbdzxDXFy8h9U03XKmeSJmz%2Bmb782Uom4wXeg7XyflEj3vTQl0EacBD%2F1euxzqRKOGzwrvZY5TwE%2Fv6ukotmXb4fi2bwdq20iGkFzk2wQY%2BrWVQuBGIlpFja8sL7r2sI%3D"}],"group":"cf-nel","max_age":604800}
content-type
text/css; charset=utf-8
access-control-allow-origin
*
access-control-expose-headers
*
cache-control
public, max-age=31536000, s-maxage=31536000, immutable
timing-allow-origin
*
cf-ray
7fbaa9825d790bcc-AMS
icon.png
adzblockersentinel.net/images/
18 KB
19 KB
Image
General
Full URL
https://adzblockersentinel.net/images/icon.png
Requested by
Host: adzblockersentinel.net
URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
39961a166fb76b4bc71b9c36a48eb038d0608d78ee9670ba785533c47c824402

Request headers

accept-language
nl-NL,nl;q=0.9
Referer
https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36

Response headers

date
Thu, 24 Aug 2023 09:45:23 GMT
cf-cache-status
REVALIDATED
last-modified
Mon, 05 Dec 2022 11:51:58 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
"638ddb5e-4945"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=9NYfAXXmWa%2BVjoHGAIsJofW9hJ9eyJ9Rd3oD5IphNtzngG5Rw32V3rS5pBTl41n81tMYsR83%2BmkqHx%2F7wYUknHqAXx8k%2Bv3dUBnulAOeSlq5HYH9yguso5Y2KTztl1cSPg0THRU%2FvstvUQc65hdNbxFWLX2W"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=1200
accept-ranges
bytes
cf-ray
7fbaa981ee6c06c0-AMS
alt-svc
h3=":443"; ma=86400
content-length
18757
cwsstore.png
adzblockersentinel.net/
3 KB
4 KB
Image
General
Full URL
https://adzblockersentinel.net/cwsstore.png
Requested by
Host: adzblockersentinel.net
URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
2b74fcd6c38eb603d9c86cd1c8cb97ba423d200d7e3e555cbc5a704ac456e00f

Request headers

accept-language
nl-NL,nl;q=0.9
Referer
https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36

Response headers

date
Thu, 24 Aug 2023 09:45:23 GMT
cf-cache-status
HIT
last-modified
Tue, 06 Dec 2022 09:53:22 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
age
5280
etag
"638f1112-d6b"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=Qj2DQ55s7H49Hz4IkEtKGQCRao2X3dyfwAyC0%2B%2BbGHHAJoB%2BMhiEfCFfQV15mdOMerJLG1PJw42br%2FzG%2FW3urFGnFaPA3KBkf9m7qd65uZ9fns4zGc114ByctAo9f4kEQGcWwD%2BZvGH58W3HS4VwqTGsHMPZ"}],"group":"cf-nel","max_age":604800}
content-type
image/png
cache-control
max-age=1200
accept-ranges
bytes
cf-ray
7fbaa981ee7006c0-AMS
alt-svc
h3=":443"; ma=86400
content-length
3435
email-decode.min.js
adzblockersentinel.net/cdn-cgi/scripts/5c5dd728/cloudflare-static/
1 KB
1 KB
Script
General
Full URL
https://adzblockersentinel.net/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js
Requested by
Host: adzblockersentinel.net
URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
2595496fe48df6fcf9b1bc57c29a744c121eb4dd11566466bc13d2e52e6bbcc8
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Frame-Options DENY

Request headers

accept-language
nl-NL,nl;q=0.9
Referer
https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36

Response headers

date
Thu, 24 Aug 2023 09:45:23 GMT
content-encoding
gzip
x-content-type-options
nosniff
last-modified
Mon, 21 Aug 2023 15:15:55 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server
cloudflare
etag
W/"64e37fab-4d7"
vary
Accept-Encoding
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=FHyn061LJH2enPeaHCynQFPnGxNJcBI36BOettDFJH0QPL5O1ZJEW7EO%2BgulD0VspacsAEIdI8R8FwwK%2B81ylrX2qgjvdEVg2uMy5nUzniU5ZLbYQnSATlMorAzmOexAgJDkGHmnzZjuVdvJPQRu67bSvi%2Fy"}],"group":"cf-nel","max_age":604800}
content-type
application/javascript
x-frame-options
DENY
cache-control
max-age=172800, public
cf-ray
7fbaa981ee6f06c0-AMS
expires
Sat, 26 Aug 2023 09:45:23 GMT
lsrhfuyb.gif
icngebmpnhfbjilmgbdfjbfdhcnocjac/dnr/resources/
0
0

a.php
alumbroso.info/ Frame 4CD9
96 B
1 KB
Document
General
Full URL
https://alumbroso.info/a.php?id=0066&e=VPGCNBK0FG&c=brkv369Z3Yppi&r=kv&cid=7c09a58024ef482da2564767063fdfd9&z=4412&v=3&dr=&inw=1600&inh=1200
Requested by
Host: adzblockersentinel.net
URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
8d5f7d977f9b96d4f7abe30653ea52b3406938d5175ebb743bf839beab7f59f6

Request headers

Referer
https://adzblockersentinel.net/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36
accept-language
nl-NL,nl;q=0.9

Response headers

alt-svc
h3=":443"; ma=86400
cf-cache-status
DYNAMIC
cf-ray
7fbaa9833f5db8e8-AMS
content-encoding
br
content-type
text/html; charset=UTF-8
date
Thu, 24 Aug 2023 09:45:23 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
p3p
CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=7tIfAAsQwJ3RZsJn51bPPgCADQr5pxMxJkVRxerCiui9J1s%2BINCUFMGVuYOh3Zk4glMW%2FoFpUnuMCnxfL%2F9rnw%2BqEVmgduVU13Ud6AeHIdCErbNJtV%2FPCZ%2FXQrZVoyysDD5Oi1SRUZoUEvuFZA%3D%3D"}],"group":"cf-nel","max_age":604800}
server
cloudflare
vb.php
adblockersentinel.com/ Frame 7BAC
0
557 B
Document
General
Full URL
https://adblockersentinel.com/vb.php
Requested by
Host: adzblockersentinel.net
URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a06:98c1:3120::3 , United States, ASN13335 (CLOUDFLARENET, US),
Reverse DNS
Software
cloudflare /
Resource Hash
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Request headers

Referer
https://adzblockersentinel.net/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.110 Safari/537.36
accept-language
nl-NL,nl;q=0.9

Response headers

alt-svc
h3=":443"; ma=86400
cf-cache-status
DYNAMIC
cf-ray
7fbaa9835c920b47-AMS
content-encoding
br
content-type
text/html; charset=UTF-8
date
Thu, 24 Aug 2023 09:45:23 GMT
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=hf%2B%2FICSQ2MEWbEVAzGIPxJLcsw%2BdNm2Xm6EefwRXUHk27Ihc3bdbHyzx8U4mkpMyWGvr%2FrCMDXeK7sIXXeiKyoG0oS%2B%2BiwUvUizGMmAf55DUbNokGeud%2BtKGFz06sXUxZsIBO12rEIaU%2BVm8aG%2F841e6hm8%3D"}],"group":"cf-nel","max_age":604800}
server
cloudflare

Failed requests

These URLs were requested, but there was no response received. You will also see them in the list above.

Domain
icngebmpnhfbjilmgbdfjbfdhcnocjac
URL
chrome-extension://icngebmpnhfbjilmgbdfjbfdhcnocjac/dnr/resources/lsrhfuyb.gif

Verdicts & Comments Add Verdict or Comment

11 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

object| 0 object| 1 object| documentPictureInPicture object| req_existing_user object| landing_iframe function| openNewWindow function| openNewTab function| openSameTab function| listenInstallCompleted function| openInstructions object| windowObjectReference

7 Cookies

Domain/Path Name / Value
.alumbroso.info/ Name: c0066
Value: brkv369Z3Yppi
.alumbroso.info/ Name: r0066
Value: kv
.alumbroso.info/ Name: cid0066
Value: 7c09a58024ef482da2564767063fdfd9
.alumbroso.info/ Name: z0066
Value: 4412
.alumbroso.info/ Name: v0066brkv369Z3Yppi
Value: %7B%223%22%3A1%7D
.alumbroso.info/ Name: e0066
Value: VPGCNBK0FG
.alumbroso.info/ Name: _asd
Value: 16928703236756444

2 Console Messages

Source Level URL
Text
javascript error URL: https://adzblockersentinel.net/sentinel.php?fh=brkv369Z3Yppi&v=3&fo=4412&fk=7c09a58024ef482da2564767063fdfd9&fj=kv(Line 50)
Message:
Access to XMLHttpRequest at 'chrome-extension://icngebmpnhfbjilmgbdfjbfdhcnocjac/dnr/resources/lsrhfuyb.gif' from origin 'https://adzblockersentinel.net' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, https, chrome-untrusted.
network error URL: chrome-extension://icngebmpnhfbjilmgbdfjbfdhcnocjac/dnr/resources/lsrhfuyb.gif
Message:
Failed to load resource: net::ERR_FAILED