This article provides some resolutions to common errors.

I am having a connection problem with AIHost.

Error message 

Unable to connect, connection failed, AIHost is unavailable, etc.

Resolution

Check if any of the AIHost dependency files have been blocked. 

You can unblock them all by running the below operation on all files in a directory.  

Open Windows PowerShell in the directory. 

Run:    Get-ChildItem -Recurse | Unblock-File