If you fail to connect to online servers in Diablo 2 Resurrected and get a "failed to connect" error, you can fix it by restarting your PC or router. Sometimes both methods will be enough to fix any issues your PC has connecting to the Diablo 2 servers. Also, checking your internet connection and restarting the game can help.
However, one of the first things you should always check is if the servers are down or experiencing any hiccups. If the servers are down, there will be no way to fix them on your end beyond working for Blizzard.
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Because of this, you will need to wait for the servers to eventually come back up after Blizzard fixes the issue.
You can check if the servers are down by viewing official social media accounts for the game and company and viewing sites such as down detector.
If you find that the servers are down, then just sit tight, get a snack, or play offline mode by creating an offline character. Sooner or later, the servers will come back. After that, you won't get "failed to connect" errors anymore.
Be sure to check out our Diablo 2 Homepage for all the latest news, guides, and information about this classic game!
Andrew Vaughan is a Contributing Writer at Pro Game Guides that has written guides on popular RPGs and FPS survival titles for several years. Andrew Vaughan specializes in survival and roleplaying games and has been a lifelong gamer.