I experienced the same issue both today and yesterday, and was about to make a bug report.
The impacted experience loads as normal after the dialog box is closed.
Other experiences open normally after the dialog box is closed.
When I closed Roblox Studio and re-opened it after getting the dialog box today, the impacted experience still failed to appear in Recent. In addition, no dialog boxes appeared.
I had also assumed moderation before realizing it was just a bug.