Unable to connect on VPN server with google 2FA

[Dieterm5]

Hi everyone

I've been trying for days to be able to connect to my VPN server with google 2FA.
I've followed every step and everything works without 2FA, and when I reconfigure everything over again but with google 2FA

Followed steps:

OVPN_DATA="ovpn-data-example"
docker volume create --name $OVPN_DATA
docker run -v $OVPN_DATA:/etc/openvpn --rm kylemanna/openvpn ovpn_genconfig -u udp://VPN.SERVERNAME.COM -2
docker run -v $OVPN_DATA:/etc/openvpn --rm -it kylemanna/openvpn ovpn_initpki
docker run -v $OVPN_DATA:/etc/openvpn -d -p 1194:1194/udp --cap-add=NET_ADMIN kylemanna/openvpn
docker run -v $OVPN_DATA:/etc/openvpn --rm -it kylemanna/openvpn easyrsa build-client-full CLIENTNAME nopass
docker run -v $OVPN_DATA:/etc/openvpn --rm -it kylemanna/openvpn ovpn_otp_user CLIENTNAME

google-authenticator --time-based --disallow-reuse --force --rate-limit=3 --rate-time=30 --window-size=3 \
    -l "${1}@${OVPN_CN}" -s /etc/openvpn/otp/${1}.google_authenticator

docker run -v $OVPN_DATA:/etc/openvpn --rm -it kylemanna/openvpn ovpn_getclient CLIENTNAME > CLIENTNAME.ovpn

Pamtester says everything is OK

In my logs on the server it says:

Could not create temporary file '/tmp/openvpn_acf_78c265702ae917f36e22368e66075c2a.tmp': Permission denied (errno=13)
TLS Auth Error (verify_user_pass_plugin): could not create deferred auth control file
TLS Auth Error: Auth Username/Password verification failed for peer

I've tried to give permissions on /tmp directory, but nothing helps...

What am I doing wrong?

(Sorry for broken english)