The Wasteland 3 “GOG.com servers returned an unknown error’ (E9) error” message usually occurs when the user has finished downloading a certain portion of the game, usually in the 90+%, but can occur at any moment. Some users also report to see the error message after a 100% download. The frustrating thing is that the ‘Install’ button appears to be greyed out as a result of the error. In such a case, there are certain things you can do. Stick around and we will share all we know about the error and possible workaround.
Fix Wasteland 3 ‘GOG.com servers returned an unknown error’ (E9) | Install Button Greyed Out
If you are worried that it’s a local issue with your connection or the client, don’t stress yourself. We are sure that Wasteland 3 ‘GOG.com servers returned an unknown error’ (E9) is due to server problems. As such, the best fix is to leave the game at 100 percent after you have encountered the error and try playing the game after a few hours.
Many players who encountered the error were able to play the game without any fix. It appears that the problem is already fixed from the server end.
If the error still occurs for you, try running the game through the game executable. You can locate it at GOG Games folder or GOG Galaxy > Games folder > Wasteland 3 folder > click on WL3.exe.
This should launch the game and you should be able to play. That’s all we have in this guide, we will update the post when we have more on the error.