I found a few similar problems on the internet but none of the answers can actually fixed my problems. I can only add 1 Gmail account for personal and the Work account cannot be added due error 400. I also have a custom domain account selfhosting so I don't think it is Thunderbird fault. 1. I have no VPN 2. I use no firewall 3. I use the latest Thunderbird 115 4. I made sure to clear caches 5. I do not accept cookies from anysite 6. I always use Mozilla recommend config for Gmail which is SSL/TLS and OAuth2 7. IMAP is turned on 8. This is the link has 400 error (I got this after enter the correct login email), see [1] 9. I have apache2 server for web deverlopment, and there was an answer in here suggested that it might block Thunderbird from receive Google Token. So I disable the apache2 but still nothing change. [1]: ​https://accounts.google.com/v3/signin/identifier?app_domain=http://localhost&client_id=406964657835-aq8lmia8j95dhl1a2bvharmfk3t1hgqj.apps.googleusercontent.com&continue=https://accounts.google.com/signin/oauth/legacy/consent?authuser%3Dunknown%26part%3DAJi8hANQbAfnrnTTw2GOEyWYrdFPg9linUmuxuzp9zgE_medSqW1ZjF_F7JbV_1Flty0f_kK2dEJKVyJxZ21XEr6KUAQ5D43pWdBP_YA_nvbp8Nf78unHNZiySbBrnu0WTeJ78Dab4MnLFLO7mmxdLrlBRn8KxT4aj5_RVOiQcjVtwuJD8grCJotQTpTT4MCUsQDfUR1vm1yFjRoKxyI-IupT-AJULoNUlGK_LwCsuZcj_OkZspwbxdrfsR9zPHarx751U_UYYWRErbBKnJT6TWEg4dcpfNPCCz273t8wS5Ge32dvW6BtWfH0f8U2IM9MtxD2yXLn3yh9FfCWJkywfKIanzpu5UW_3Yxx0ufpQYkJQ1w-8uusl8nA54jsSg9LGei2-TA0MO-Y9QIfsC38KdfBPa0w5I45nOoKRtOxa_dp-3T3lKuHV8VV8HCS21gUvjm97Nt02dUlmyN2cET3XG3U5JkHdE9LQ%26as%3DS-770877868%253A1695787974718267%26client_id%3D406964657835-aq8lmia8j95dhl1a2bvharmfk3t1hgqj.apps.googleusercontent.com%26theme%3Dglif%23&dsh=S-770877868:1695787974718267&flowName=GeneralOAuthLite&login_hint=example@gmail.com&o2v=1&opparams=%253F&rart=ANgoxccgnQO7srBR2bWuXHIQXf6fFss9sZPD5DS23s_C72BaJcGSfkKAsalbUJo1lL6Y24IXz1YoVCh5N5AUJZi1XkJvD6OWDg&redirect_uri=http://localhost&response_type=code&scope=https://mail.google.com/+https://www.googleapis.com/auth/carddav+https://www.googleapis.com/auth/calendar&service=lso&theme=glif