Hello SierraZuluS,
it looks like something happened during saving the project.
Where are your data saved?
Can you check the RCPROJ file in the Notepad, if there is the mentioned file? Also, if the file is in the project folder?
It is possible that the only solution will be the deleting the component’s part from the RCPROJ file, but that means it will possible to open, but without that component.