[2021] Server crashes on booting custom map

The bottom line seems to be that:

• Specifying the custom map in the ini files does work
• Passing the custom map as the first parameter on the command line (which normally works for the Exiled Lands and Siptah) fails when using the custom map

The error being "LoadPackageAsync failed to begin to load a package because the supplied package name was neither a valid long package name nor a filename of a map within a content folder: ‘’"