Configuring coTURN

Hello everyone
I just set up coTurn in my NextCloud server. So I installed it in the same IP Adress of my Ubuntu server 20.04.
TURNSERVER_ENABLED=1 Done
listening-port=<3478>
fingerprint
lt-cred-mech # Only on coTURN below v4.5.0.8!
use-auth-secret
static-auth-secret=<yourChosen/GeneratedSecret>
realm=your.domain.org
total-quota=100
bps-capacity=0
stale-nonce
no-loopback-peers # Only on coTURN below v4.5.1.0!
no-multicast-peers
in my admin page in talk settings
turn and turns mydomain:3478 UDP and TCP
I have followed the instrucions of :
https://nextcloud-talk.readthedocs.io/en/latest/TURN/

And still get error and could not established try again later.
I also when I test the server get an error : NO working ICE candiates

Any suggestion please ?
Any tutorial should I follow ?
The version of TALK is 13.0.4
Version Coturn-4.5.1.1

Did you config your firewall? E.g. i am running UFW:

To Action From


3478 ALLOW Anywhere # coturn

Hello thank you for your reply. I have completely disabled UFW