It says that The filename, directory name, or volume label syntax is incorrect, but doesn't specify which file is problematic. Below is an excerpt of the output with the error message: ...

However, I'm getting an error when I try to create an appx file. It says that The filename, directory name, or volume label syntax is incorrect, but doesn't specify which file is problematic.

When a file is added to OneDrive, it syncs it across devices. If you deselect a folder from OneDrive and choose to sync, you may receive an error— The file or folder already exists on OneDrive.