Dennis,
We will also need logs from gateway-va, connector-va and service-va when you tried to login. Can you please send them? You can do it by private message.
gateway-va: /opt/vmware/nginx/logs/
service-va: /opt/vmware/horizon/horizoninstance/logs/horizon.log
connector-va:/opt/vmware/c2/c2instance/logs/connector.log