SYMPTOM:
In Web 9.4.1 and 10.x, run a prompted report. After answering the prompt and click 'Run', an error appears.

Then click Re-prompt, it does not show the same error and stays in state of "Processing request" instead of returning error message.

STEPS TO REPRODUCE:

CAUSE:
This is a known issue in Strategy Web 9.4.1 and 10.x
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.
WORKAROUND:
In Web, go to Project Preferences, under History List, select "Manually" for option "Add reports and documents to my History List".