I am facing a very weird case with Experience Optimization in Sitecore 9.1.1 described below:
- I logged-in to Sitecore as admin
- Went to Experience Optimization
- Created a new page test
- Selected a page item
- After selecting it I can see below screen with blank preview
This same page test is working in Sitecore 8.2 Version. So don't know exactly what is the issue here.