Kam Hung, Lin (Ken)

I have the same error too. But why the error message is "Microsoft.DotNet.DesignTools.Client.DesignToolsServerException: Invalid URL: The hostname could not be parsed"? 

I tried to update the User's Home directory in User Properties under ADUC as the following, 1) Update to be using the Computer's C:\TestingFolder, But the folder is still server's...

I am also having the same issue with JQuery 3.2.1. Tried the above fix, but now it generate another error "Syntax error, unrecognized expression: #"