MOZILLA_PKIX_ERROR_MITM_DETECTED

[Marcva]

After updating my W10 to 19044.2006 a had som trouble with my antivirussoftware. Support uninstalled AdGuard for Windows for some reason.
AV is up and running. But after rinstalling AdGuard Firefox can't open a page any more. Errorcode MOZILLA_PKIX_ERROR_MITM_DETECTED.

Any clues?

 

[H3lper]

Hello!

Please proceed with the instructions written in this article: "Potential Security Risk" error | AdGuard Knowledgebase
Let me know if this helps

 

[Marcva]

Tnx. I got stranded in step 2: local.adguard.org/cert times out.
With Adguard running nor disabled.
Reinstalling certificate option didn't help either.

 

[Boo Berry]

Try removing AG's certificate from Firefox and rebooting the PC.

 

[Marcva]

Try removing AG's certificate from Firefox and rebooting the PC.

No such certificate in FF

 

[H3lper]

No such certificate in FF

"nx. I got stranded in step 2: local.adguard.org/cert times out."

- Please disable all VPN and similar apps to access the website and start downloading.

 

[Marcva]

"nx. I got stranded in step 2: local.adguard.org/cert times out."

- Please disable all VPN and similar apps to access the website and start downloading.

Tnx.
Disabled VPN already. Disabled Anti Virus too. Can't reach page. FF, nor Chrome.

Would a reinstallation of AG help?

 

[H3lper]

Tnx.
Disabled VPN already. Disabled Anti Virus too. Can't reach page. FF, nor Chrome.

Would a reinstallation of AG help?

Doubt it but give it a try. Seems like something is blocking this webpage,
Also, make sure you don't run any extensions in your browsers as well, just in case.

 

[Boo Berry]

If all else fails you can try using the AG advanced uninstall utility found here: https://cdn.adguard.com/public/Adguard/tools/Uninstall_Utility.zip