I use my Roundcube to pick up email from a variety of sources, including Gmail, but the latter has failed to authenticate with the Google IMAP servers in the past 24 hours.
Google states in the following article
https://support.google.com/accounts/answer/6010255To help keep your account secure, from May 30, 2022, Google no longer supports the use of third-party apps or devices which ask you to sign in to your Google Account using only your username and password.
I can't see any obvious work around to this. Any suggestions gratefully received.