New Media Source Won't Scan

[KodiUser1138]

By new Media source I assume you mean new Library? What is your set-up? hosting through docker, baremetal or windows?

Maybe jellyfin doesn't have permissions to the files and media inside the new library you are trying to add.

A new source added to an existing library, a new network path to a new storage location through Windows 10. The same as all my other media locations that have worked fine prior to JFv10. JF has full access to all other locations and this new location works fine on the LAN and through other programs and systems. Even directly using the folder on the same local machine the JF server runs fails to add any items to the library. Nothing has worked short of killing this version and reverting back to JFv9. Almost all the contained media was previously scanned without issue into JF in other network locations before needing to reconfigure some storage and create a new drive shared folder location.