SYMPTOM:
"Error in report results. Your request could not be processed due to a server error." and "Incorrect edit mode : 1" error message appears when enabling report objects panel before a condition in view filter is finished and changing "Select" in the condition to "Qualify" in Strategy Web 9.3.1.
Follow the following steps to reproduce the issue in Tutorial project:

CAUSE:
This is a known issue with Strategy Web 9.3.1.
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.