I have installed version 7.9 of Enterprise Search with a Basic/Free license.
I have added a custom source, and indexed some documents.
All of a sudden, the content source got disabled:
"Requires features not supported by current license"
Content source is disabled
Your organization's license level changed and no longer supports Document Permissions.
Don't worry: your data is safe and search has been disabled.
Upgrade to a Platinum license to re-enable this source.
I have not used any document level permission fields while indexing documents.
Did I do anything wrong? How can I remediate this?