SYMPTOM:
Running a Report Services document from Strategy Mobile for iPad 9.4.1 iOS Update 4 results in a black screen being displayed as shown:

CAUSE:
This is a known issue with Strategy Mobile for iPad 9.4.1 iOS Update 4.
ACTION:
Contact Strategy Technical Support for an update on this issue.
WORKAROUND:
Uncheck the property to “Use as an Information Window for the Map widget”. This property is found by editing the Report Services document and navigating to Tools -> Document Properties -> Mobile:

NOTE: The issue can happen to documents with this setting regardless of whether they have a Map widget on it or not.