Unable to select Network media location for Win 10 server

Plex Media Server
2
  1. Plex server must be started after the drive letter has been assigned to the network share.
  2. If Plex server is running as a system service, it cannot see the drive letter mappings which were made under other Windows user accounts. You will have to use UNC paths instead. How to add files on a NAS to a Plex library on Windows