FAST Search: Failed to communicate with the WCF service

I was creating my managed properties to my FAST server (via FAST PowerShell) when I encountered this error

Get-FASTSearchMetadataManagedProperty : Failed to communicate with the WCF service

The resolution was pretty simple - I followed the steps in this link:
1. Add the user to the Windows group FASTSearchKeywordAdministrators
2. Log off the machine and log in again.
3. Problem resolved.

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