I have a WD EX4100 and I install the Plex software version 11114730 in it. It worked quite well until I had to re-install the server.
Once reinstalled it fails to detect the local server and its libraries (NAS WD EX4100).
Restart both the Plex service and the NAS and still continue without finding the local server (NAS).
Uninstall the software from the WD dashboard following the WD installation guide. Ref: https://support.wdc.com/knowledgebase/answer.aspx?ID=15072
Reinstall the Plex application again and the problem continues.
I will appreciate if you can indicate how to solve this problem.