DNS_PROBE_FINISHED_NXDOMAIN Error running on own Cloud while trying to acces the dashboard

Im currently trying to acces the dashboard on my own openhab-cloud.
I already got my domain up and can acces it with the domain. If i click the link to the dashboard it redirects me to home.mydomain.com and i get a DNS_PROBE_FINISHED_NXDOMAIN Error.
Any fix for that?

I also checked the logs and it is full with:

2022-02-09 08:01:53:5353 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:01:55:5555 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:01:56:5656 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:01:57:5757 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:01:58:5858 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:01:59:5959 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:00:000 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:01:011 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:02:022 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:03:033 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:04:044 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:05:055 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:06:066 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:07:077 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:08:088 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:09:099 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:10:1010 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized
2022-02-09 08:02:11:1111 warn: openHAB-cloud: GCM XMPP error: SASLError: not-authorized

You created a DNS entry for home.mydomain.com ?

With regard to

Did you configure GCM jid/password in config.json ?

So i just got the home.myopenhab.com and myopenhab.com a dns entry.

The normal site works, if i click the link to a dashboard the site stays white and my console is showing me this:

Do you run one or two instances of apps.js ?
Here two instances are running. One on port 3000 and one on 3001.
nginx redirects some stuff to port 3000 and the other to 3001.

I think i always ran only one instance, do i need to start a second one?

I am running two instances one on port 3000 and one on 3001.
It may be possible with just one instance but I did not manage that.

I posted my configuration at