Login is invalid when trying to login to cPanel
Receiving the error "The login is invalid" when trying to log into cPanel is typically due to your IP address changing too frequently.
The following error you will see:
The issue occurs when your ISP issues dynamic IP addresses and sets the lease time too low. This results in your IP address frequently changing and then cPanel cannot verify the login is from the same machine.
A workaround is to obtain a static IP address or use a VPN which will keep your IP address the same for your entire session.