KB237145: A Visual Insight Dashboard using a Custom Group as a filter for a Visualization opens as a blank white page in MicroStrategy Web 9.3.1.

SYMPTOM
A visualization can be set to filter other visualizations on a Visual Insight dashboard in Strategy Web 9.3.1.  If the visualization is set to filter targets when selecting elements of a Custom Group, the dashboard will render as a blank white screen after execution.  This can be seen in the screenshot below.
 

 
STEPS TO REPRODUCE

1. Create a Custom Group and add it to a report. 
2. Add 1 additional attribute and 2 metrics to the report.
3. Create a Visual Insight dashboard using the report from step 1 as a dataset.
4. Create a bar graph visualization with the Custom Group and a single metric.
5. Insert a second grid visualization that contains the additional attribute and metric.
6. Go to the Filtering Options on the bar graph visualization.
7. Apply filtering to the grid visualization, allow user to clear all selections, and filter targets when selecting elements of the Custom Group.
8. Save and exit the dashboard.
9. Navigate through the folders to the location you saved the dashboard and execute it.  Notice that the toolbar appears at the top of the dashboard, but the rest displays as all white.

 
CAUSE
This is a known issue in Strategy Web 9.3.1.
 
ACTION
Currently this issue is still being reviewed for feasibility by our Technology team and it is not scoped for any upcoming scheduled Strategy release.
 
This issue has been logged with Strategy internal reference number 1014714.