I use Thunderbird to manage my personal Gmail. After changing my Google account password, I had to go through the authentication process. At first, it failed with the message: “Cookies are not enabled. Try again.” On my main PC (Windows 10 Pro), I tried several times to set up my Gmail account in Thunderbird (profile changes, uninstall/reinstall), but without success. After those attempts, Thunderbird stopped showing the “cookies” message, and every setup attempt now ends in a blank (white) page: either just before the second-factor authentication (2FA), or — less often — right after the 2FA is completed. This behavior continues even now that cookies are properly enabled. The first Thunderbird version I used was 142.0, but I also tried 115.13 and 140.2 ESR with the same result. In all cases, the process always ends with the blank page, and the account setup never completes.

Thank you in advance for your help.