Trying to add GMail; popup window to log into GMail returns a 404 message
Using v128.2.0esr (64-bit) on Windows 10
Trying to add GMail, had no problem adding other email accounts. I follow the same process- enter creds and click save/continue. Thunderbird opens a new window for me to sign into GMail to complete the process. It results in a 404 error:
400. That’s an error.
The server cannot process the request because it is malformed. It should not be retried. That’s all we know.
Screenshots attached
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Make sure cookies are allowed in Thunderbird. Also see https://support.mozilla.org/en-US/kb/automatic-conversion-google-mail-accounts-oauth20