What device u using anon?
IPhone? iPad? Desktop? Etc?
Muh iPhone and iPad did the same thing, they are downing sites and forcing the upgrades. Did the upgrade to new iOS on just one device and all the pages work again. Had the same 1.5 second flash then the page was white screened. Couldn’t find any other way around the issue. Not what you want to hear I’m sure.. good luck anon.