"Internal error" in Request Search and Solution Search after upgrade to 16000 and 16010

"Internal error" in Request Search and Solution Search after upgrade to 16000 and 16010

When I try to add solution to resolution of request it shows "Internal error" and does not search any solutions by keyword.
Only manual choose of Topic shows Solutions I want to apply,  which then can be added to Resolution.


Also top menu Search of Requests doesn't search by keywords if "Default search" is chosen.



At the same time search by Request ID works fine.
I tried to re-index modules one by one, then "All modules" using commands

reIndexData.bat Request
reIndexData.bat Solution
reIndexData.bat Project
reIndexData.bat AllModule

It didn't help either.



Please advise.