FreeRDP doesn't work saying "This instance seems not to be working. Try to enter the console again."

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I configured Openstack for using with Minimal Hyper-V Core Server. Finally I managed to make everything work almost perfectly except FreeRDP console. The problem I don't even know how to debug this software, where to find its logs etc.

I get below error while trying to open the console in Horizon. ERROR: This instance seems not to be working. Try to enter the console again. The problem is that instance is running,pingable and when I connect to Hyper-V server by RDP and run powershell command "Get-VMConsole instance-00000013" I get the console and everything works fine.

My Hyper-V side Cloudbase software configs could be seen from below links:

--neutron agent config-- https://db.tt/lXUHvmZ0Pk

--nova config-- https://db.tt/HAvG7NwMiC

-- freerdp config-- https://db.tt/FXxh1yfXrq

Hope you have some quick answer how to debug a fix the problem.

ENVIRONMENT is like below: I installed 2 servers:

1) Centos 7 with Openstack all-in-one. 10.5.5.91 - office network for server access. 10.15.15.91 - Management network connected to Hyper-V

2) Hyper-V Core server. 10.5.5.99 - office network for server access. 10.15.15.99 - Management network 10.91.0.99 - Virtual Switch for VMs' connections to external public network.