Console (HTML ESXi 6.7) on iOS (iPad) "Failed to connect"

Hi

I am trying to get the console working from my iPad Pro, I'm running against ESXi 6.7U1 with Safari, I get the console window but only with the text "Failed to connect". It works fine with Safar in MacOS but I need this when I'm mobile. Are there some way of getting this to work?

Thanks