After investigating this particular issue thoroughly, it turns out that there are several different scenarios that might be triggering this error code. Here’s a list of potential culprits: Now that you are intimately familiar with every potential culprit that might be responsible for the apparition of this issue, here’s a list of verified methods that other affected users have used to resolve the ‘Connection Attempt Failed’ with Divinity Original Sin:
Method 1: Make sure you have the same version as your co-op buddy (if applicable)
According to a lot of affected users, this issue is often reported to occur in those instances where you and your co-op buddy that you’re attempting to cooperatively with are running different versions of Divinity Original Sin 2. If the game was just patched, chances are either one of you is running on the older version which is determining the game server to refuse the connection due to a build version incompatibility. To resolve this issue, you’ll need to force your launcher (Steam or Gog.com) to update Divinity Original Sin 2 to update to the latest build. Obviously, you need to talk your friend into doing the same. Depending on the launcher that you’re using, follow one of the sub-guides below to make sure that Divinity Original Sin 2 is updated to the latest version available.
A. Update game on Steam
B. Update the Game on GoG.com
If you already ensured that you’re launching the latest version of Divinity Original Sin 2 and you’re still encountering the same kind of issue, move down to the next potential fix below.
Method 2: Changing the Windows 10 Profile
As weird as this particular fix might seem, there are a lot of Windows 10 users who reported that they managed to resolve the ‘Connection Attempt Failed’ error and connect to online sessions with no issues after they’ve created a new Windows profile and launched the game while it was active. If you’re on Windows 10 and you suspect that you might be dealing with a corrupted profile, follow the instructions below to learn how to create a new user profile on your Windows 10 computer: If you’re still having the same issue with Divinity: Original Sin 2, move down to the next potential fix below.
Method 3: Launch the game from the EoCApp.exe (Steam Only)
If you’re encountering this issue on Windows 10 while launching Divinity Original Sin 2 via Steam, you might be able to avoid the apparition of the ‘Connection Attempt Failed‘ error by launching the game via the EoCApp executable instead of using the default game’s shortcut. Several affected users have confirmed that this operation finally allowed them to play the game cooperatively. If this scenario is applicable and you’re launching the game through Steam, follow the instructions below to create a shortcut for the EoCApp.exe and launch the game through there to avoid the apparition of this issue entirely: If the problem is still not resolved, move down to the next potential fix below.
Method 4: Checking the Integrity of Game’s files (Steam and GOG.com)
If none of the methods above have proven to be effective in resolving the ‘Connection Attempt Failed‘ error in your case, you should start to consider that the issue might be related to some type of file corruption that is affecting the game installation. In case you think this scenario might be applicable, you can resolve the issue by performing a file integrity check and repair on your Steam or GOG installation. Several affected users have reported that the error was fixed after they ran an integrity check on Steam or a Repair on Gog.com Galaxy. Depending on the launcher you use to launch Divinity: Original Sin 2, follow one of the sub-guides below to check the integrity of the game’s files on Steam or Gog.com Galaxy and resolve the ‘Connection Attempt Failed‘ error:
A. Verifying the Game in Steam
B. Verifying the Game in Gog.com
If you’re still encountering the same ‘Connection Attempt Failed‘ error even after running integrity checks on Steam or GOG.com, move down to the next potential fix below.
Method 5: Open Divinity: Original Sin 2’s Ports
If none of the methods above have been effective in your case, you should consider that this particular issue might be related to a game port that is not opened on the network that you’re currently connected to. If this scenario is applicable, you can ensure that the ports used by Divinity: Original Sin 2 are all opened by enabling UPnP (Universal Plug and Play) if your router supports it or by forwarding the used ports manually if you’re using an older router. Note: Regardless of the method that you’ll end up going for, it needs to be done on both your PC and your friends’ PC if you’re playing cooperatively.
A. Enabling UPnP
Keep in mind that nowadays, the vast majority of routers are automatically capable of forwarding the ports used by the game you’re actively playing with a feature called UPnP (Universal Plug and Play). So unless you modified the settings on your router, this UPnP feature should be enabled by default. However, if you made some changes yourself, here are some instructions on enabling UPnP in your router settings. In case UPnP is not supported by your router, follow the instructions below to forward the ports manually.
B. Forwarding the game’s ports manually
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