No library when using any version over v15.2

I have a Synology NAS set up with MariaDB (5.5.47-0037) to handle my library, so I can use whatever client in my house and have a sync’d library. I’d like to update to the latest version but my library disappears when I open up v16 or v17 beta. The sources are still intact, and I can attempt to set what each content should be, but it doesn’t seem to save.

Does anyone else have a similar setup or know of any solutions?