Diablo 4 is a great chance to put together your favorite Necromancer builds or level up your Druid build. But you can’t do that if you run into Error 300202, which prevents you from even starting the game. You encounter this just as you log into the game and it prevents you from playing, which is frustrating for obvious reasons. So, here’s how to fix Diablo 4 Error 300202.
Fixing Error 300202 In Diablo 4

Diablo 4’s Error 300202 is a server-side error that occurs when the servers aren’t working properly. Too many players are trying to get in at once or the server requires some maintenance. Whatever the cause is, there’s little you can do on your end since Blizzard manages the servers. Check Blizzard’s Customer Support on Twitter to see if their servers are down or if there are ongoing problems. Blizzard will post an update saying that the servers are back or keep you informed of their progress. You can’t do much other than wait if the servers are experiencing problems.
Sometimes customer support won’t update right away. Wait a few minutes and see if there are any updates or check with friends to find out if they have the same problem. If the problem isn’t limited to you, then it is likely the error is on Blizzard’s end. A message should show up from Customer Support explaining the situation and how long the solution will take.
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The problem could also come from your Internet connection and your inability to connect to the server. Make sure that your router is working and that it can connect to the Internet. Check your firewall to see if Blizzard is on the blacklist and allow it to go through. Restart Diablo 4 and see if that makes the error go away. You might have to restart your PC or console to solve the problem. If Blizzard’s servers are fine, a quick refresh on your end should get rid of Error 300202 and let you resume playing Diablo 4.
You will not need to fix Error 300202 for Diablo 4 in most cases because Blizzard will be responsible for it. Only when Blizzard’s servers are working properly and you can’t log in should you start using other solutions. Most of the time, a simple reset will fix the problem and you can get back to playing. Otherwise, contact Technical Support and see what they can do to fix the error for you.