I'm not able to open any module quiz

Hi team,
I’m not able to open any module quiz in System Architect.

When I’m trying to start, clicking on start button I see blank form. In browser console I see error:

Failed to load resource: the server responded with a status of 400 (Bad Request)
items.learnosity.com/v2021.2.LTS/activity?&a=get&c=JjP3ahvyvLqnEGLG&s=a83b0c23-dbb3-4a77-aec8-e78bd7e4740a:1

@pietp this issue is resolved now. We apologize for the inconvenience. Force a refresh of your browser: Ctrl + R (Windows) or CMD + R (macOS)