I bought a new Macbook Air computer. I am unable to add one of my two email accounts to Thunderbird. The first works without a problem. When trying to add the second account I get the following error message: "Unable to login at server. Probably wrong configuration, user name or password." The user name and password have been entered correctly. The email account that I cannot enter is hosted by google. I have both email accounts on Thunderbird on 3 older computers which work fine. Thanks in advance for helping me sort this out!