Hi.
My DNN 521 installation has been running fine for several weeks. however, in the last 24 hours it has stopped allowing anyone to log in to any of the portals in the installation. I have a 4.9.x instance on the same server which is working fine.
I did an iisreset and restarted the sql server service on the server to no avail. Have tried logging in with both firefox and IE unsuccessfully.
In firefox i usually just get the response ""Received a invalid response" (Note the grammatical error).
In IE I get
The XML page cannot be displayed
Cannot view XML input using style sheet. Please correct the error and then click the Refresh button, or try again later.
Invalid at the top level of the document. Error processing resource 'http://partners.rev-id.com/Default.aspx'. Line 1, Pos...
Received a invalid response
^
At first I thought it may have something to do with having the RSS module on the login page causing some kind of problem. but i couldn't login to any of the portals even without the RSS module on the page.
I've tried logging in as a normal user and superuser - no difference.
Any assistance would be greatly appreciated.
Thanks in advance. Chris.