Something changed. I’ve tried to set up my old AOL email account multiple times using different default browsers, and the setup typically fails. Using Edge, I get “Edge: Too Many Requests” . Using Firefox, I get “Waiting for authorization in login popup…” and then the old rotating arrow. After about a minute delay, the Account Hub reports “Authentication error.” The Thunderbird Account Hub reports the outgoing server settings test good. I’ve changed my AOL email password, and have an AOL application password ready to use, but never get asked. I’ve turned off two-step verification in AOL, but same Thunderbird behavior. I’ve got multiple computers, and this issue is the same on all. I’ve had no problem adding a Gmail and SBCGlobal.net account. Thunderbird is 144.0.1 (64-bit) release. Windows 11 Home, version 25H2. I really don't want to give up Thunderbird, but I need this account badly.