Cannot login after installation - (Firefox 82)

I’m having the same problem.
Using Firefox 89.01 on Ubuntu. Chromium works fine

@jstuck can you open a new issue, with the details of the server, browser and error? Since upgrading firefox didn’t solve your issue then it’s not exactly the same parameters, so we consider it to be a separate issue.

hi @jstuck another user reported similar issue with firefox using multi-account container plugin. Could it be your issue?

Same issue here. After activating the account, on the last step this error appears. But the user works just fine afterwards.
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