When playing Diablo IV, you may notice that the action bar or skill bar may randomly stop working. While you may see your controller inputs being registered in the heads-up display user interface, your character may not respond to it.
To see how you can fix this specific control issue, you can take a look at this troubleshooting article from Seeking Tech.
1. The most common way to make the action bar work normally again is to try having a conversation with a non-playable character in the game that will give you multiple dialogue options.
Once you have finished your talk, the glitch should be fixed as you should be able to use your skills again.
2. If talking to the NPCs in the game does not work, then you can try logging out and then logging back into the game.
3. You can also try closing the software and then re-opening it.
If you are playing Diablo 4 on the Xbox Series S or Xbox Series X, then you should make sure that you remove it from the Quick Resume queue. Otherwise, the game will end up getting suspending instead of being closed.
In order to do so, open the Xbox Guide menu by pressing the Xbox button on your controller. Once you get there, move the cursor over to the Diablo IV icon and then press the Menu button. Finally, select the Quit option.
4. Restarting your PC or console may help as well since the control issues may be related to the operating system.
5. Make sure you have the latest patch downloaded and installed for Diablo IV. The action bar problems seem to be a pretty common bug that may likely get fixed in a future title update.
6. If you still can’t use your skills, then you can try using a different controller to see if your character will respond to your commands.