Suddenly an error appeared out of nowhere when managing groups.
"Count data for smart groups is not currently calculated. You may click Update >Smart Groups to generate it. Be aware this can cause significant server load." (screenshot 1)
When I try to Update Smart Group Count or click on Contacts of any group, there is the error:
Sorry but we are not able to provide this at the moment.
DB Error: unknown error
Return to home page.
Meanwhile, the database is NOT down. I can access contacts through search.
What could have happened? Where do I start looking for solutions?
CiviCRM 4.7.14. on Drupal 7.52