This error generally means that you do not have a project.binary nor a project.godot file in your Strive program folder. If you followed the install instructions, then as this error would have appeared without the debug mod, it appears that you accidentally removed or renamed both such files during installation. If you did not follow the install instructions, then go back and do that, as running the debug mod without installing it will also cause this error.
I do not have precise info on what you did, so I cannot accurately guide you to the solution. If you installed the Debug mod and those two files are no longer in the Strive program folder, then you either need to fetch those from the Recycle Bin or reinstall the Strive program folder. If you did not install the Debug mod, then there should be no point in re-installing.
