Plex on Netgear RN 316

I’m running Plex on my NAS box and, since the most recent update, I can no longer see the libraries.

I have seen it suggested that I should probably rebuild the database, but I have zero idea how to do this on the NAS. Any advice?

Otherwise, any other help on getting my libraries back?

Help…PLEASE!!!

duplicate of Can't find media libraries after upgrade
closing.