"Bad Request" Error in Firefox

[mahmut]

Hi, my school uses Webex for online education.

I upgraded my computer to Windows 11 and I use Firefox browser. Now, I couldn't enter to my online lesson with Firefox. I enter "Virtual Meetings" page and click to "Join", the connecting page says "Error Bad Request".

I must use another browser. I wasn't having this problem when I was using Firefox in Windows 10. Screenshots are attached.

Best regards.

[shuabgeller]

Have you checked other browsers? Is it an issue with FF only?

Have you checked joining after the teacher has begun the session or is this before the session has begun?

[mahmut]

Yes, I checked with Opera and it worked without any problem. I tried to join after the teacher has begun the session.

[Nithin Eluvathingal]

As a workaround change the default browser to Opera..