TURN server installation on AWS EC2 free-tier instance

I enabled all necessary ports for coturn server on my instance from security group. I also configure the turnserver.conf file correctly, but still when I added my turn server on trickleICE, it shows error 701.

Here is my turnserver.conf:

listening-port=3478

# and 5349 for TLS (secure)
tls-listening-port=5349
#alt-listening-port=80

# Require authentication
fingerprint
lt-cred-mech


# Specify the server name and the realm that will be used
# if is your first time configuring, just use the domain as name
server-name=mydomain.com
realm=mydomain.com

# Important:
# Create a test user if you want
# You can remove this user after testing
user=<myusername>:<mypassword>

#min-port=705
#max-port=1000

total-quota=100
stale-nonce=600

external-ip=<my public ip>/<my private ip>
listening-ip=<my private ip>
relay-ip=<my public ip>

Screenshot of ec2 inbound security group: security-groups

Screenshot of: TRICLE ICE RESPONSE

Can someone help me with this? When I entered the command

sudo systemctl status coturn

The status is active screenshot of coturn status

There may be two parts from your config file that needs to be modified.

1. set the relay-ip to your private ip address.

external-ip=<my public ip>/<my private ip>
listening-ip=<my private ip>
relay-ip=<my private ip>

2. In your ec2's security group settings, you have set the inbound rules for IPv6 addresses. You should add 0.0.0.0/0 (for IPv4) to the CIDR blocks field in the inbound rules.