User Session Replay not available?
You aren't able to view what a user did on your web app...UX monitoring not installed or user session replay feature is disabled.
1) User Experience Monitoring not working
Please check User Experience data not available? for the solutions
2) Conguration disabled
2.1) UX Profile Settings:
Go to Analytics > UX Monitoring Profiles
Pick one profile
Make sure Session Replay Monitoring is checked