[Windows] Meeting Plugin 0.9.4: "Something went wrong" after clean install

Hi,

I have been trying for hours now to get Meetings to work. I installed the Meeting Plugin but as soon as I try to connect, I see my Video stream for a second and then a black screen with the error message:
“unfortunately something went wrong, we are trying to fix this” …

I have an OpenFire 4.2.3 Windows Server on a Server 2016 x64 Std (yes, no Linux). OpenFire is connected to my domain via LDAP but I have allowed anonymous access.

Installed on my client I have Spark, newest version. I tried using the Meeting with Chrome and Firefox (both latest). Same error.
I have tried mapping a cname (focus.mydomain.de) do my openfire server but that did not help (wherever this focus. comes from).

I am attaching the error logs below. Am I missing anything? Do I need to install this jitsi Bridge? How? Where?

All How-Tos seem for Linux or outdated and they assume you are already knowing how to operate this. I just entered this arena, so I might need step-by-step in some cases.

Please, can someone help me?

2018.11.06 16:50:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:51:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:52:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:53:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:54:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:55:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:56:00 INFO  [Jetty-QTP-BOSH-105]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '6m9btkz2ek@mydomain.de/6m9btkz2ek' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:00 ERROR [Jetty-QTP-BOSH-158]: org.jivesoftware.openfire.ldap.LdapGroupProvider - Could not find user in LDAP 6m9btkz2ek
2018.11.06 16:56:01 INFO  [Jetty-QTP-BOSH-157]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '6m9btkz2ek@mydomain.de/6m9btkz2ek' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:03 INFO  [Jetty-QTP-BOSH-105]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '6m9btkz2ek@mydomain.de/6m9btkz2ek' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:56:07 INFO  [Jetty-QTP-BOSH-158]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '6m9btkz2ek@mydomain.de/6m9btkz2ek' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:15 INFO  [Jetty-QTP-BOSH-105]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '6m9btkz2ek@mydomain.de/6m9btkz2ek' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:20 INFO  [Jetty-QTP-BOSH-158]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '7toozbh47b@mydomain.de/7toozbh47b' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:20 ERROR [Jetty-QTP-BOSH-105]: org.jivesoftware.openfire.ldap.LdapGroupProvider - Could not find user in LDAP 7toozbh47b
2018.11.06 16:56:21 INFO  [Jetty-QTP-BOSH-157]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '7toozbh47b@mydomain.de/7toozbh47b' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:23 INFO  [Jetty-QTP-BOSH-158]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '7toozbh47b@mydomain.de/7toozbh47b' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:27 INFO  [Jetty-QTP-BOSH-105]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '7toozbh47b@mydomain.de/7toozbh47b' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:56:35 INFO  [Jetty-QTP-BOSH-158]: org.jivesoftware.openfire.spi.RoutingTableImpl - The anonymous user '7toozbh47b@mydomain.de/7toozbh47b' attempted to send data to 'focus.mydomain.de', which is on a remote domain. Openfire is configured to not allow anonymous users to send data to remote domains.
2018.11.06 16:57:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()
2018.11.06 16:58:05 INFO  [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-VideobridgeExpireThread]: org.jitsi.videobridge.VideobridgeExpireThread - Running expire()