WD my cloud and error with plex

Hi,
please help me.
From some days i receive this error when i try to go to the configuration of the app:
{number of my ip of the NAS}:32400/web

---->

not disponible


Otherwise i cant see that server in my other device.

Someone can help me for this problem?

no one can help me?
WDMyCloudEX4100

Could you reboot / restart and if the problem remains get the logs through an ssh login and copying the logs out and zipping and attaching here - please indicate what time you attempted to connect to the server

See this article for location of the application data where the Logs folder would be
https://support.plex.tv/articles/202915258-where-is-the-plex-media-server-data-directory-located/

Make sure the local network subnet is in the private network ip range and connect to the WD mycloudex4100 from same network