Gmail Won't Sync

Gmail stopped syncing all of a sudden. I’ve been using it for a couple months and its been working fine. I deleted my account and added it back, it says username or password may be incorrect, I can login to gmail through the web though. Error log says IMAP connecting to gmail failed. Have checked all the settings and they are correct, in gmail settings gave the app full permission and tried turning off 2 step verification. Any ideas?

Having the same issue.
Also tried using Thunderbird, Microsoft Mail, Mailbird and Outlook to try and work around the problem. Of those programs only Mailbird is currently syncing with gmail.

Same here, Thinderbird and MM won’t work either. It must be something with GMail. I’ll try MailBird.