XMPP addon does no longer connect to ejabberd

@Friendica Support I had always a working XMPP instance on my friendica instance. Now it doesn't connect. I have enabled debug log in .htaconfig file but nothing is written there.

With pstree I can only see beam.smp with 18 beam.smp threads but no ejabberd_auth.php sub process which did happen before. strace tells me that it tries to read from 0 (stdin) so it seems to wait for input. Access rights and correct user/group are set (0700, ejabberd.ejabberd according to documentation). Yet still it isn't starting.

Any ideas what might cause this?
@Friendica Support addon ejabberd friendica jabber xmpp
Have you changed the path to ejabberd_auth.php? It moved to "scripts".
No, I still have it in include but it did work before. Sure, I need to find some time for updating my instance ...
Then try at first a regular XMPP client to see where the problem is.
As I said, only beam.smp is visible in pstree view, no forked auth_ejabberd.php.
You are on the develop branch. When have you updated your system? Several weeks ago the script moved.
And no, it is not working. Not even a single debug message in ejabberd.log.
Okay, I have always updated ejabberd.cfg but ejabberd.yml is used. No wonder that auth_ejabberd.php was never loaded. Now it is loaded but still the same. I'll digg deeper for this ...
Please check via an external client.
Tried it with #gajim, no change. :-(
Somehow it listens only on IPv6 requests, which I surely not do (not now).
Okay, the private key part in ejabberd.pem was missing. Now I can connect and even with SSL.
Still nothing on friendica's side. It looks like no connect is going through. http-bind is available at https://f.haeder.net/http-bind and returns a 503?
Have a look at your system logfile (/var/log/user.log). There you should see some lines for "auth_ejabberd".
I have found out that ejabberd's http-bin was listening not on but instead on public IP. Maybe misconfiguration, still I'm getting a 502 on pointing my browser to https://f.haeder.net/http-bind

http-bind settings and listener

<IfModule mod_proxy.c>
<IfModule mod_proxy_http.c>
ProxyPass /http-bind retry=0


# netstat -lnp|grep 5280
tcp 0 0* LISTEN xxxxx/beam.smp
apache24 bosh ejabberd http-bind
newer older