This error means your local working copy is missing a file referenced by the project model. If you are sure that you don't have any changes yet(I mean you are going to develop for the first time), one solution is to use Revert all so Studio Pro can re-download a clean copy from Team Server. If that does not work, delete the local project folder and open the app again from Team Server.
1- Ask your colleague ensure all changes are committed and pushed to the Team Server
2- Ask a third colleague to download and open the app. If the problem persists for them, it’s definitely a repository issue, not just your setup
3- Windows sometimes struggles with very long file paths or special characters
4- Delete your current local folder for the project and Re-download the app from the Mendix Team Server