Cannot login to the Plex WebUI

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I want to start the PlexMediaServer WebUI but everytime this error occurs:

Firefox can't connect with the Server under

I can not login with the Plex App also.

But I can login to the unRaid webUI.

I'm using unRaid 6 and all Plugins are up-to-date.

This error occurs since I added owncloud.

So I deleted everything via telnet, also I deleted all browser cookies. After that I added Plex Media again, but the same error occurs.

Currently I use  jus PlexMedia and a Windows 10 VM

Windows says that a Windows socket entry is missing but which one I don´t know. I use the newest 64 bit version of Windows 10.

And I found no solution on the fora. On the Microsoft Forum as well as on this one.


This is my System Information:


CPU: Intel® Xeon® CPU E3-1225 v5 @ 3.30GHz

HVM: Enabled

IOMMU: Enabled

Cache: 128 kB, 1024 kB, 8192 kB

Memory: 8192 MB (max. installable capacity 32 GB)

Network: bond0: fault-tolerance (active-backup)

eth0: 1000Mb/s - Full Duplex

eth1: not connected

Kernel: Linux 4.1.18-unRAID x86_64

OpenSSL: 1.0.1s


Attached you can find my diagnostics.


I hope you can help me.


PS: I don't know whether it says "Firefox can't connect with the Server under" in the english Firefox, because I'm a german. In Germany it says "Firefox kann keine Verbindung zu dem Server unter aufbauen."

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Thanks for your help.

But I found my mistake, as I deleted the appdata share I deleted the Docker image together with it.

I'm so stupid.


Sorry for wasting your time.


This is a support forum, you're not wasting anyone's time.  And I've made my fair share of stupid mistakes...  ::)

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