When trying to add an event from the Raiser's Edge (RE) in either event registration form the second page of search results may not displays any events and will say "No records found matching your criteria."
This is caused by special characters in the description in the event record in RE, to fix this follow these steps:
Log into RE
Click Records > Events
Search for event and open the event record
Delete any special characters from the description
Click Save and Close
Meanwhile we are currently evaluating this issue and will update this article when we have more information.