Server doesn't show on Mac, but do on iOS-app

Plex Media Server
1

Server Version#: newest
Player Version#: newest

Until a little while ago, I could access my one and only Plex-server, coming from a WD My Cloud Home… Today I couldn’t access anymore. Troubleshooting had me connect a new server - but this time, it couldn’t find my WD My Cloud Home, and added my Macbook instead, from where I added the files from the WD through. I’m having a lot of trouble understanding why I can’t access my server “My Cloud Home” from my Macbook, while I actually can in the iPhone app. Plex Media Server on Macbook doesn’t give me the opportunity to find the other server, where I added and sorted my whole libery throughout many months. Please help me!

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I also can’t change metadata to ex. a danish translation of a foreign movie. Hoping for some Plex-head help here, very soon.

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And what are the odds of getting actual help here?