hello! today the exact same thing happened to me.. did you find any solution? i casually saved the project in school but later this day i tried to open the same project at home and "failed to open map view" ...
thanks for any advice!!! 🙂
Meanwhile, could you try the following options?
1. Close all applications. Restart your system.
2. Try opening the APRX file from a fresh ArcGIS Pro instance? Project > Open. Also
3. Save As the project to a new location, and try opening the newly saved file.