Our client attached a database from SP 2013 testing environment to SP 2013 Production env. Now they are getting the error:
http 400 bad request.
I have never done this before, so I was wondering if there are any tips as to what might be causing this, or where can I start to look for the issue?
I have checked the IIS, the sites and the pools are running fine. I have restarted them by the way. And I have checked the ULS logs and I see nothing there related to http 400 bad request.