Blizzard has released a small Diablo 4 patch for all platforms today, June 12, to fix bugs that unfortunately crept into recent updates.
The State of Diablo 4 in Season 5
Even though it's a decent micropatch (it's only 319.3MB to download), make sure to manually update Diablo 4 if you don't have downloads and updates set to automatically download as soon as they're released. This is because many are experiencing "error 75", the authentication account error, meaning Diablo 4 is not the live version.
That's why you should update Diablo 4 today.
The Diablo 4 micropatch that Blizzard released on Wednesday, June 12, implements the following bug fixes: