316610 error help

I played the free trial version of Diablo 4 on Steam for 3 hours and selected a character from the paid expansion. Today, I decided to buy the Standard Edition of the game. I created a new character (a Sorcerer), and error code 316610 popped up immediately.

Here is what I have already tried to fix it:

  • Cleared Steam download cache
  • Changed my Battle.net password
  • Verified the integrity of game files on Steam
  • Created new Barbarian and Druid characters, trying both the campaign option and the endgame skip option

None of these steps helped.