Proxy to Another Service

My goal is to go to the Dashboard from the Main Site while showing the Main Site’s URL with /dashboard. For some reason, all I receive is a blank page and a console error that doesn’t make any sense.

Main Site:

Goal: actually shows the but retains the URL.


/dashboard   200
/*    /index.html   200

I also do have Pretty URLs turned on.

Can you try /dashboard 200! please?