Unable to create host

Hello,

When trying to create a host from satellite to our VCenter, i get following message:

Failed to create new-host.example.com's realm entry: ERF12-5287 [ProxyAPI::ProxyException]: Unable to create realm entry ([RestClient::BadRequest]: 400 Bad Request) for Capsule https://capsule-server.example.com:9090/realm/EXAMPE.COM

In /var/log/foreman-proxy/proxy.log i found following message:
Failed to initialise credential cache from keytab: krb5_get_init_creds_keytab: Preauthentication failed

Please tell me how to resolve this?