I'm in Oracle WebCenter Content in Imaging. I am getting an error dialogue that says "A repository error occurred. Unable to retrieve search results. Error occurred while processing. Unable to return results."
Look at the last message in the error box. The field with the issue will be listed, followed by the resolution.
In the example above the date was incorrectly entered as 1/7/20191. Removing the extra 1 will solve the issue.