When I try to start openVPN on a client I see this error on a server:

Sat Feb 22 02:32:10 2020 Authenticate/Decrypt packet error: packet HMAC 
authentication failed
Sat Feb 22 02:32:10 2020 TLS Error: incoming packet authentication failed from 
[AF_INET]

cat server.conf 
proto udp
port 9000
dev tun
mode server
ca /etc/openvpn/cert/ca.crt
cert /etc/openvpn/cert/clinic_atom.crt
key /etc/openvpn/cert/clinic_atom.key
dh /etc/openvpn/cert/dh.pem
topology subnet
server 192.168.141.0 255.255.255.0 
client-to-client
ifconfig-pool-persist ipp.txt
client-config-dir ccd
keepalive 10 120
tls-auth vpn_clinic.key 0
tun-mtu 1500
tun-mtu-extra 32
mssfix 1200
duplicate-cn
comp-lzo
max-clients 100
persist-key
persist-tun
status openvpn-status.log
log /var/log/openvpn.log
log-append /var/log/openvpn.log
verb 3

On client-config:
clinic_atom.conf 
client
dev tun
proto udp
port 9070
topology subnet
remote xxx.xx.xx.xx 9070 # static IP
resolv-retry infinite
tun-mtu 1500
tun-mtu-extra 32
mssfix 1200
persist-key
persist-tun
remote-cert-tls server
ca "/etc/openvpn/clinic_atom/ca.crt"
cert "/etc/openvpn/clinic_atom/syscon7.crt"
key "/etc/openvpn/clinic_atom/syscon7.key"
tls-auth "/etc/openvpn/clinic_atom/ta.key" 1
comp-lzo
log /var/log/openvpn.log
log-append /var/log/openvpn.log 
verb 3

-- 
Thelma

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