Error when trying to run client though Arctium launcher

I got both the realm and world servers running, I Got the WOW client, the guide says to use Arctium Launcher but when trying to run it gives me error:

Server with host name *** does not have a trusted certificate attached.
If you are the server owner be sure to generate one and replace the default bnet server certificate.
One way to generate one is through Let's Encrypt.

Any idea??

you have to sign the files for the server using a cert service like certbot or lets encrypt then upload them to the server and set the config settings CertificatesFile = to the certs file and PrivateKeyFile = to the private key then in put them in the wow folder with arctium and wow bin and you should be good to go

hi i follow your procedure the certificate error is gone but when connecting to Arcitum launcher client dragonflight version 10.1.7(51313) i always getting You have been disconnected (BLZ51914001). can you help me what im missing?