Can't create a room : trying and trying again to reconnect

Install & Config
1

I have issue to make a new room on my Jitsi Meet instance https://meet.spheerys.fr :

Sorry, an issue was encountered.
We will try to fix it. Re-connection in 20 seconds…

My server is an OVH VPS, and it’s not behind a NAT.
It’s got 4Go RAM.

I normally correctly opened the ports: TCP - 80, 443, 4443, 5347, 8000 and UDP - 10000

My /var/log/jitsi/jicofo.log file :

Caused by: java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:607)
	at org.jivesoftware.whack.ExternalComponent.connect(ExternalComponent.java:174)
	... 11 more
Jicofo 2020-04-22 13:07:09.317 INFO: [33] org.jitsi.jicofo.health.Health.log() Performed a successful health check in PT0.009S. Sticky failure: false
Jicofo 2020-04-22 13:07:09.397 SEVERE: [37] org.jitsi.meet.ComponentMain.log() java.net.ConnectException: Connection refused (Connection refused), host:localhost, port:5347
org.xmpp.component.ComponentException: java.net.ConnectException: Connection refused (Connection refused)
	at org.jivesoftware.whack.ExternalComponent.connect(ExternalComponent.java:296)
	at org.jivesoftware.whack.ExternalComponentManager.addComponent(ExternalComponentManager.java:242)
	at org.jivesoftware.whack.ExternalComponentManager.addComponent(ExternalComponentManager.java:222)
	at org.jitsi.meet.ComponentMain.lambda$getConnectCallable$0(ComponentMain.java:285)
	at org.jitsi.retry.RetryStrategy$TaskRunner.run(RetryStrategy.java:193)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:607)
	at org.jivesoftware.whack.ExternalComponent.connect(ExternalComponent.java:174)
	... 11 more
Jicofo 2020-04-22 13:07:09.542 SEVERE: [36] org.jitsi.xmpp.component.ComponentBase.log() Failed to send ping
java.lang.NullPointerException
	at org.xmpp.component.AbstractComponent.send(AbstractComponent.java:925)
	at org.jitsi.xmpp.component.ComponentBase.access$400(ComponentBase.java:36)
	at org.jitsi.xmpp.component.ComponentBase$PingTask.run(ComponentBase.java:577)
	at java.util.TimerThread.mainLoop(Timer.java:555)
	at java.util.TimerThread.run(Timer.java:505)

What’s going wrong ?

2

From the point of view of a casual user of jitsi-meet, a bewildering number of things given that the only hard information given by your logs is that something has tried to connect somewhere and it failed. Given that jitsi-meet include lots of moving parts connecting to each other, it’s not much.
Your post says also that you have opened ports that are normally not exposed in a one server open to the internet case: 4443, 5347, 8000.
So what ? could you share more about the software your installed, how, what are the versions ? Did you follow some procedure or howto, preferrably up-to-date since jitsi-meet changes fast ?