Vmware horizon view protocol failure symptoms

In View Administrator, the desktop reports the status error:
Configuration Error
or
Protocol Failure
The entitled user is able to connect to the desktop using PCoIP, but cannot connect using Remote Desktop Protocol (RDP).
The Protocol failure state may be displayed when VMware Horizon HTML Access failed but PCoIP and RDP are working and the desktops are available and View Client devices can access them through PCoIP or RDP.
In the debug logs, you see entries similar to:
PROTOCOL><PROTOCOL><NAME>RGS</NAME><PORT>42966</PORT><STATUS>unavailable
</STATUS><ERROR-CODE>PROTOCOL_ERR_PORT_NOT_LISTENING</ERROR-CODE></PROTOCOL><PROTOCOL><NAME>PCOIP</NAME><PORT>0</PORT>
<STATUS>negotiate</STATUS></PROTOCOL> <AGENTREADY>true</AGENTREADY><ACCEPTINGCONNECTIONS>false
</ACCEPTINGCONNECTIONS><ERROR-CODE>AGENT_ERR_PROTOCOL_FAILURE
Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.
In the PCOIP logs, you may see entries similar to:
MM/DD/YYYY, 07:51:31.773> LVL:0 RC:-500 IMG_FRONTEND :cSW_HOST_FRONTEND::open_display - Error attaching to SVGADevTap, error 1: Failed

Vmware Horizon View Client

Restart the VMware Horizon View Connection Server service. VMware Horizon View and HTML access (Blast protocol) VMware vCenter Server Appliance (VCSA) 5.5 deployment tips and tricks. Everything is green but the destination Server red – Down! We opened Firewall completly to be sure, ther is no failure config. But it stays still red. Horizon 7 component was upgraded, and the RDS host must be restarted to allow Horizon Agent to operate with the upgraded component. Protocol failure: The RDP display protocol is not running correctly. If RDP is not running and PCoIP is running, clients cannot connect using either RDP or PCoIP.

Vmware Horizon View Protocol Failure Chart

Note: These symptoms apply only to a virtual machine, and not to a physical computer.