Error while signing in user

My user and pass are ok but I cant login in Grafana. I dindt updated and did nothing. I just didnt login in a while and when i tried i cant do it.

The error says: [Error while signing in user]

Welcome to the forum. What version of Grafana are you running? Cloud or OSS?
When was the last time you successfully signed into Grafana? Have you tried using different browsers?