Blank page when using Upgrade Wizard

When I clicked the first “Next” in Upgrade Wizard, it shown “System check in Progress” ,after several seconds it turn into a blank page .
I’m using Version 7.7.7 and I wanna update to 7.7.9.
Anybody can help ?

I am on version 7.11.13 and I am seeing the same behavior. It is not timing it out. I get the blank page withing in a second or two.

The problem I am having is the same one that is documented in this thread: