ezgmail needs manual authentication once a week

[nemethpetergyor]

I have been using ezgmail on a raspberry pi 4 for a month now to automatically check and download e-mail attachments every 10 minutes and it's working flawlessly except for an annoying authentication issue. I think I set up the OAuth correctly (according to the latest instructions), but after a week of operation with no issues the script asks me to manually do a new authentication:

Failed to start a local webserver listening on either port 8080 or port 8090. Please check your firewall settings and locally running programs that may be blocking or using those ports.

Falling back to --noauth_local_webserver and continuing with authorization.

Go to the following link in your browser:

After I'm doing so, the script starts to work for another week again. Is it a limitation of ezgmail or am I missing something?

[jpoirier]

Note that typing another (extraneous) semicolon returns the "picoc>" prompt.