Cisco 1900 login issue

Hi guys,

I have an issue with router login. The error is authentication failed.
It’s C1900 and all of a sudden nobody is a le to login using the set pssword. While I took the console its on Execution mode > and while entering to Privilege mode the same password is working.
The pass is set as encrypted in line vty password 7.
Users use to connect it using SSL vpn via Fortinet firewall. Will there be any issue with the firewall authentication settings ? Has someone experienced such issues please suggest.

Check your authentication server if it’s working or not.