Umbraco Backoffice Login stop working suddenly

Question

I am using UmbracoCMS 7.6.2 in one of my site.

Today when I tried to login in Umbraco backoffice using mysite/umbraco, will my working credential, it shows me error:

Answer 1

I had the same problem with the Umbraco version 7.7.4 assembly: 1.0.6505.22489. I have tried different ways to solve the problem.

I got a solution when I synchronized my local database with my online database.

The problem was on the table umbracoServer and umbracoUser. I only updated those, and my backoffice started working again.