These are some common error messages you might run into when failing to log in.
Proton Mail Bridge is exclusive to our paid plans. Upgrade your account to use Bridge.
If you’re already on the Free plan, you can upgrade to a paid plan by logging into the web app at account.proton.me(new window) and going to Settings→ Go to settings→ Dashboard.
Incorrect login credentials
For any other error that prevents you from logging in, please contact our Customer Support team(new window).