I am using VMware on a Windows10 box. No problems connecting locally.
I have opened port 8123 on my router and have a consistent external IP so I am not using a Dynamic DNS.
When I try to create a Server on m iPhone X in the HA app, using HTTP://MyExtranalIP:8123, it asks me for authentication then I get a NWerror 0.
If I use Chrome on my Iphone, using the same address, everything seems to work fine.
Bottom line, I can connect with Chrome but not the IOS app. Any ideas?