The project [path] could not be opened: Project is incompatible with StudioX profile. You can open it in Studio and fix the errors.
Invalid structure, ActivityBuilder implementation is missing
I didn’t make any changes that would have made it incompatible? Also, I can’t open it in Studio since my license (Free) doesn’t have access to Studio, so how do I actually fix it?
Save the file and you should be able to open the project in StudioX again.
Rather bad bug and really annoying that 1) required arguments are broken, 2) the error message doesn’t help at all (had to do a lot of digging to reproduce), and 3) that it tells you to use Studio to fix it when you can’t use Studio as a Free user, meaning most people will just think their file is broken and give up. Or worse, recreate their file from scratch, and then run into the same issue, wasting all that time.