When I expand the classification in the knowledge search I get the following error:
Object reference not set to an instance of an object
It give an error on the event viewer as follows:
Unable to find reloaded metadata object 'AttributeTypeProxy' with unique identifier a18d6905-9af6-4584-b67c-072f89f36cd1. Please restart application.
Does anyone know what causes this? I have restarted the application but the same thing happens.
This issue happens when an email notification fails in the OutBound email queue. After making any changes to the email templates, iisrest would be adivable and restarting the Email Manger OutBound and InBound services.
Retrieving data ...