Icecast server in tumbleweed not working

Dear all
I have installed icecast in tumbleweed. I can start it using the command icecast -c /etc/icecast.xml, but I’m unable to run it as a service, the command systemctl start icecast.service brings always up this error message here:
Failed to start icecast.service: Unit var-run.mount not found.
As an (interesting) option I wanted to try AzuraCast, which uses a suspicious installation routine (Docker). BTW, I gave it a try, but this cannot be installed, the installation fails with the following message:

ERROR: Unsupported distribution ‘opensuse-tumbleweed’

Any ideas about? Thanks in advance.

The error message is pretty clear. Delete var-run.mount from the icecast.service unit definition and open bug report.

Next time post computer output as preformatted text.

Thank you for your answer. This solve that problem, but what ist var-run.mount for? Next point which I could not solve is the further configuration of icecast. I want to use this as relay between my radio station and my media players (VLC, Strawberry). Background is, when I start the stream directly from the player I will be punished at any time with 30 to 60 seconds of ads. Currently I use CVLC for that which makes a good job but the mp3 metadata from this stream is not tranferred through this CVLC relay. I tried also FFMPEG, with the same result.
Now I try to use icecast fetching the stream from the radio station with FFMPEG and forwarding it to icecast, also here, no metadata:

ffmpeg -i http://stream.radio1.ch/128k -acodec libmp3lame -ab 128k -content_type audio/mpeg -f mp3 icecast://source:one4you@localhost:8000/stream.mp3

Obviously there should be a relay function in icecast, but I had no success to get this to work. Is this possible and how it has to be configured? That here is what I tried, unfortunately the is no acceptable documentation about this to find:

    <relay>
        <server>http://stream.radio1.ch</server>
        <port>80</port>
        <mount>/stream.mp3</mount>
        <local-mount>/stream.mp3</local-mount>
        <on-demand>0</on-demand>

        <relay-shoutcast-metadata>0</relay-shoutcast-metadata>
    </relay>

Thanks in advance