Check both the service and client logs in the top right menu on the client. Also verify the domains are configured correctly and re-import the profile. Below are all the addresses and how to configure them.
Hosts Tab
Host Public Address: The public IPv4 address or domain of the Pritunl host. This should always be the public IP of the host for all configurations even when using a load balancer.
Host Public IPv6 Address: The public IPv6 address or domain of the Pritunl host. This should always be the public IP of the host for all configurations even when using a load balancer.
Host Sync Address: In the advanced host settings. The public address or domain that the web server of the Pritunl servers can be accessed from. If a load balancer is configured that address should be set here.
Top Right Settings
Connection Single Sign-On Domain: Only shown when using single sign-on connection authentication. The public address or domain that is used to validate single sign-on requests through the Pritunl web server for a new VPN connection. If a load balancer is configured that address should be set here. Requires valid SSL certificate.