@snarfsov
“System error 0” occurs when a step was missed setting permissions for the “Plex” share.
Please look here.
- Confirm all your metadata still exists in Plex/Library/Application Support/Plex media Server
- Uninstall the DSM 7 package w/ ERASE option
- Apply the permissions manually as I show above
- Run package installation again.
- It should not fuss as much as before and start installing – be patient.