The game was updated on September 17
Installed version: 1.40.0.0.62065
Right now I started the game three times to check if there is an error.
Since I’m halfway to the seasonal ban in competitive games (thanks to Blizzard’s servers), I only checked Practice Range.
Each time when entering Practice Range for the first time, the game requested an update. How is this even possible if the game uses the latest version?
At the third start and approach to the Practice Range, an error
Unknown Error (-5) error applying update
occurred, I was thrown on the screen of re-login to the game.
It is not necessary to think for a long time that the Error must be repeated at the next entry to the competitive game. I can’t test the quality of this game more deeply yet 
It was an American server
On the European server I received an error from the first attempt to enter the Practice Range
On the Asian server, I needed five restarts of the game for an error when entering the Practice Range
So far I can only say that changing the server does not help 