I want to close on the solution. Since I was having same issue with 4 different browsers, I followed the advise of the error message I was getting "If the problem continues, contact us." After contacting Apple support and getting a call-back, we were able to work through the issue and after a remote share session it was agreed it was something at their end. After a few hours issue was fixed. I was very impressed with the way my support call was handled and getting my problem fixed.

I just tried to view one of our apps in App Store Connect from my MacBook using Safari and get the same issue as my last post. Apple system Staus shows green but fails every time I try to select one of our apps from the My Apps list.