I accidentally deleted Thunderbird from the applications granted permission to access my google account. Thunderbird, when accessing the gmail account, is asked to verify the password to the google account. The applet on the screen is exactly the same as the one used by google to sign in. However, when selecting the NEXT button, nothing happens. The applet is frozen. It looks like a google problem (as google has recently changed the appearance of the login applets. However, it is only with Thunderbird I am having the problem.