OVPN Script error

Hello guys
i have a full script from ovpn to perform a ovpn server the script works perfectly on v7.15.3
BUT the last code didn’t work which is :
/interface ovpn-server server export-client-configuration server-address=123.123.123.123 ca-certificate=CA.crt
client-certificate=client.crt client-cert-key=client.key
I cant export the file directly is there a problem in my code ?