ERR_TUNNEL_CONNECTION_FAILED when trying to access some academic resources

[Balaraj]

Balaraj last edited by

Dear Opera Support Team,

I am writing as a student researcher experiencing persistent technical difficulties with Opera Browser (macOS) that are preventing access to critical academic resources. I urgently need assistance resolving the ERR_TUNNEL_CONNECTION_FAILED error that occurs when trying to access academic PDFs through archival repositories.

[Balaraj]

Balaraj last edited by

Dear Opera Support Team,

I am writing as a student researcher experiencing persistent technical difficulties with Opera Browser (macOS) that are preventing access to critical academic resources. I urgently need assistance resolving the ERR_TUNNEL_CONNECTION_FAILED error that occurs when trying to access academic PDFs through archival repositories.

Key Details:
Browser Version: Opera

79.34.67.45.

macOS Version

Error: ERR_TUNNEL_CONNECTION_FAILED

Reproducible Case:

Attempting to access academic PDFs (e.g., books like "The Ulysses Theme" from Anna's Archive/LibGen)

Occurs ONLY in Opera (tested in Safari/Chrome - works normally)

Persists after:

Disabling Opera VPN & all extensions

Clearing cache/cookies

Network reset (router reboot, DNS flush)

Impact:
This blocks time-sensitive thesis research. As Opera is my primary browser for its productivity features, resolving this would greatly support my academic work.

Request:
Please provide:

Specific troubleshooting steps for tunnel errors on macOS

Insights if this relates to Opera's proxy/VPN architecture

Alternative contact methods if email support is limited

Attached:

Screenshot of error (see attachment)

image.png
Example failing URL: https://nrzr.li/.../The Ulysses theme...pdf

I appreciate your urgent attention to this academic constraint. Please advise how I might assist further with diagnostics.

Respectfully,

Bernard

[Balaraj]

Balaraj last edited by

Respected sir, please look into this issue urgently, not able to access 'it appears nrzr.li' As a student I need to get my works at the earlest. Please look into this issue.

OS: Mac OS X 10.15.7

IP: 93.34.60.234
This site can’t be reached
The web page at https://nrzr.li/d3/y/1752151024/10000/g2/ia1lcpdf/u/ulyssesthemestu00stan.pdf~/jdp0pSjFBQcoz3GlWj5O6g/The Ulysses theme %3A a study in the adaptability of a -- William Bedell Stanford -- Ann Arbor Paperbacks -- AA143%2C 2nd ed_%2C Ann Arbor%2C United -- The -- 9780472061433 -- c69dea11ce4944263a1239756d487906 -- Anna’s Archive.pdf might be temporarily down or it may have moved permanently to a new web address.

ERR_TUNNEL_CONNECTION_FAILED

[leocg]

leocg Moderator Volunteer @Balaraj last edited by

@Balaraj Current version of Opera is 120

If you are using a very old version of Opera and of MacOS, it's probably the cause of your issues.

[Balaraj]

Balaraj last edited by

Then what is the solutionsir?

[Balaraj]

Balaraj @leocg last edited by

@leocg Then what is the solution sir?

[leocg]

leocg Moderator Volunteer @Balaraj last edited by

@Balaraj Upgrade both MaacOS and Opera may help.