Game Wiki says DLC is compatible but it won’t work. Why?

I’ve had that. It may say that the DLC is compatible. But make sure you have the correct game updates downloaded. Some DLC requires a certain patch. Check the patch notes to see if there is a patch for the DLC. I would recheck that the DLC was installed correctly. Sometimes DLC needs to be activated through the launcher and some DLC just doesn’t show up. On PC, check the integrity of the game files in Steam or wherever you downloaded from. Sometimes there can be a conflict with other software and that causes conflicts with DLC or patches. Try reinstalling the DLC. There are also official forums, Reddit, etc. where people discuss these problems.

Then, check that you have the correct version of the casino game. DLCs are version-dependent: they might not work unless you have the minimum version installed. Look at the DLC release notes and check what version you need of the casino game itself. Corrupt game cache can also lead to this error. Redownload and verify the integrity of your files from the platform (Steam / Origin). If all else fails, and the DLC is working for other people, then most likely you’ve done something wrong or don’t have the correct version of the casino game.