I'm relatively new to Linux, but when I want to add my email account to Thunderbird with IMAP access, the Google Mail sign in popup window says "Unable to login at server. Probably wrong configuration, username or password."
I tried setting up on Gmail access for less secure apps, and have two phase login on, which did not solve the problem.
I have used Thunderbird with this Gmail account on Windows for many years without any problems.
How may I troubleshoot and resolve this?