[I have originally asked this question in German, this is the English translation] Hello dear helpers! I am currently trying to register my Gmail account with Thunderbird. Unfortunately, this is currently failing. After I have entered my access data and confirmed in the Google browser that pops up that Thunderbird should have access to my Google data, the Thunderbird that pops up again says at the top of the screen that “the password is being checked” and at the bottom left of the screen it says “the access data is being sent to Google” or something similar. After that, nothing happens. I get no error message and no message that anything has gone wrong or that there is an incorrect entry. I have waited 20 minutes, but nothing happens. Then I tried to close the program, but this didn't work because it hung up or crashed. I then had to close Thunderbird manually via the Task Manager because it didn't respond even after repeated attempts to close it normally. I then tried the same registration again. Unfortunately, the result was exactly the same. The registration request also seems to be received by Google. I get the security notification for my login in my mail app. Google allows you to “Check activity” if you believe that the login attempt is not yours, but here it was me. I didn't click on anything there, so that can't be the reason. Would someone be so kind as to help me here? I don't know what else I can do to link the accounts/register them with Thunderbird.