For comparison please also check: HowTo: Setup Nextcloud Talk with TURN server
- I collected and verified info from many other guides there, so it should be quite complete.
Btw: Avoid the guide linked by @Sanook (sorry, don’t take it personal 
), as it totally mixes up install of Spreed.ME (dedicated spreed-webrtc server) and Nextcloud Talk/speed app, which is two different things and you need just either the one or the other. Nextcloud Talk does not need some external WebRTC server!
€: Can you try to remove:
listening-ip=my.ip.adress
relay-ip=my.ip.adress
from your config. This works only, if your TURN server is not behind a NAT (directly connected to net) with static IP. Check: https://github.com/spreedbox/spreedbox/wiki/Use-TURN-server#run-turn-server-on-spreedbox-behind-nat