问题:

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:

Login failed for user admin

As, login for 'Admin' was working fine till today and suddenly stops working.

I checked the console of the browser and getting following error:

Failed to load resource: the server responded with a status of 400 (Bad Request) umbraco/backoffice/UmbracoApi/Authentication/PostLogin

I check the log files and getting following error:

Umbraco.Core.Security.BackOfficeSignInManager - Event Id: 0, state: Login attempt failed for username admin from IP address, the user is locked

回答1:

You probably tried to login with the wrong password too many times and umbraco locked you out.

To fix this go to the database, open umbracoUser table and update userNoConsole to 0 for your username.

it finally working.

I've change the useLegacyEncoding="false" to true and it starts working normally.

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.