It works !
I did manage to get the Web Interface back by recreating the SSL Apache certficate, then I could create a new CA, a new Zeroshell host certificate and affect it to the HTTPS server. It’s a painfull workarround because we have to regenerate every OpenVPN user certificate but it works…
My 1st mistake was to revoke and renew the Zeroshell host certificate without affecting it to the HTTPS service and then reboot.
Thanks a lot for your help.
😀