Diablo 4: How to Fix Online Play is Blocked (Error Code…

While Diablo 4 has received a ton of updates regarding the game's overall performance and stability, players will still encounter the odd error or two once they boot up the game. Error Code 300031 is a problem that a lot of players have been having, and thankfully, fixing it doesn't involve anything complicated.

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By Artur Novichenko

Diablo 4 Error Code 300031 prevents players from logging into the game completely. This isn't the only error that leads to the same end result, but the cause for this is a little more peculiar. Here's how to fix it.

How to Fix Diablo 4 Error Code 300031

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Error messages saying that online play is blocked are unusually prevalent among console users. The quickest and simplest fix to this is to power cycle the console:

Turn the console off.
Disconnect the power supply.
Wait for a few minutes.
Reconnect the power supply.
Turn on the console.

Power cycling basically reinitializes the console so it can perform better. This method is a common step in troubleshooting most electronic devices like computers and network modems. In the case of gaming consoles, power cycling may allow it to recognize that Diablo 4 has indeed been updated correctly, and players should then be able to log on again without any more complications with their hardware.

If this doesn't work, close the game and check for updates. There's a chance the players might not have auto-updates enabled on their console, so manually checking might be the smart move to make. If Error Code 300031 still persists, try restarting the game again. It might take several tries before Diablo 4 recognizes that it's already updated, so keep trying until the problem goes away.

Should constantly restarting the game and power cycling fail to fix Error Code 300031 for Diablo 4, then make sure that the console itself is up-to-date with the latest firmware. Again, a manual check may be necessary to kickstart the update download and installation process. If the problem still persists even after all these steps, then it's time to directly contact Blizzard for help.

Error Code 300031 is more severe compared to other in-game issues. However, the majority of players around the internet who encountered this error in the past reported that restarting their game and updating their consoles were enough to resolve the issue. Unlike other error codes, this one likely stems from the player's own hardware, though it's possible that server congestion on Blizzard's side is also the cause.

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