I keep getting (I am probably connecting to EU server since I am based there) :
Also while downloading, the percentage seems to jump back to ~50% about 3 times for whatever reason.
EDIT 1: @TurbignoX posted a video in the first reply of exactly what's happening
EDIT 2: A temporary fix (DE fix the issue regardless pls) has been provided by @Thicondrius in his reply. Basically go to the gear wheel in the top right corner, disable "64-bit" and click on "Verify Downlo