"Login failed. Please try again" Linux PAM standard authentication

[BiteMyElbow]

Second time i have a problem with login to Proxmox web interface with "Linux PAM standard authentication". The error is "Login failed. Please try again". SSH works well and first time i rebooted the server and it solved the problem but it reappears.



Please help me with diagnostics of the problem. How can i solve it permanently?

Thanks.

 

[BiteMyElbow]

Ok. Found:
[SOLVED] Login failed. Please try again
proxmox backup won't stop

I think this is my problem too. Will config backups right.

 

[BiteMyElbow]

Whatever maybe someone could tell me how i can list all VMs to see which is locked by backup process?