Claim identity is not from a trusted login provider. identity name - Issue while logout FBA SharePoint authentication

New year, new challenges...!

I'll try to be quick and to the point for this post.

For one of our clients, we have FBA implemented on their portals with custom SQL database. When we login with a user account, it works fine. The user can login, move around different pages and settings, However, when user try to Logout or Sign out, the page crashes.

Exactly similar problem as with this mate. However I couldn't put a comment there due to thread locked.

I checked the ULS logs and the Unexpected entry said.

Unexpected: Claim identity is not from a trusted login provider. identity name #.f0.blahblahDomains\blahblachAccount

Struggled around for few hours but no results. Finally something tricked in mind and I added below entry in my web application's web.config before  </system.web>

<?xml version="1.0" encoding="UTF-8"?> <sessionState mode="SQLServer" timeout="60" allowCustomSqlDatabase="true" sqlConnectionString="Data Source=YOURSQLSEVER\SQLSERVERINSTANCEANAME;Initial Catalog=[[Sessionstate service DB name ie.SessionStateService_7164dae9ad4c4cf7b3695eb5162444de]];Integrated Security=True;Enlist=False;Pooling=True;Min Pool Size=0;Max Pool Size=100;Connect Timeout=15" />

You need to set your SQL Data Source and Session State Database name. Refresh your web application, login and try to logout. Boom...! It worked.

  Cheers...!