Hello, I am using the latest Thunderbird version at the time of writing (68.6.0) on a Mac. I had successfully inserted my gmail account but when I changed the password I then got a connection error from Thunderbird. I deleted the Gmail account from Thunderbird in order to insert it again. I insert my name, user name and password, press Continue, Thunderbird makes the automatic configurations but when I press Done, I get an error of "Fail to connect with the server. Possible wrong configuration, user name or password." I have tried a couple of things but nothing worked. '''1.''' Initially, I turned on IMAP on Gmail account. '''2.''' I also check the Thunderbird automatic configuration for gmail pressing manual configuration (It is the figure I uploaded, sorry for the Greek language...) '''3.''' Following this post https://support.google.com/mail/thread/4528103?hl=en I set the '''general.useragent.compatMode.firefox''' variable to '''true''' but also didn't work. I also tried it having entered Thunderbird safe mode and also didn't work. '''4.''' Finally I set the Less secure app access of Gmail configuration to true but did not work either. Does anyone have any other suggestion? Thank you in advance.