KB46088: "Incorrect edit mode:1" or “Metric Qualification operator node has no children.” error is seen when editing a report filter in MicroStrategy Web

SYMPTOM:
 
In Strategy Web , an "Incorrect edit mode:1" or “Metric Qualification operator node has no children.” error  is seen when editing a report filter, as shown in the images below.
 
The error message when editing the report filter on the attribute: 

Error in report results
Your request could not be processed due to a server error.
Please try again. If the problem persists, contact the server Administrator.
Incorrect edit mode : 1

Error in report results
Your request could not be processed due to a server error.
Please try again. If the problem persists, contact the server Administrator.
Metric Qualification operator node has no children.

• Create a report and add Category attribute, Cost metric.
• Add Category to REPORT FILTER field.
• Click 'Apply' as it stands.
• Press the or key button few times while a small wait page is displayed.
  

 
CAUSE:
 
This is a known issue with Strategy Web 9.x.
 
ACTION:
 
This issue has been fixed in Strategy Web 10. Take advantage of upgrading for a fix.