Command + Space Spotlight shortcut stopped working I don't know what made it stopped working. I use BetterTouchTools, but not command has that shortcut and even when I close it, Command + Space still doesn't work.

I checked System Preferences → Keyboard → Shortcuts, and there is no yellow triangle warning, and again Command + Space has no other conflicts. I've restarted my computer and still the problem persists.

I don't know what else to try. Is there any way to check what is being triggered when I press Command + Space key sequence?

I am using a 15" 2017 MacBook Pro running macOS High Sierra 10.13.6.

Edit: This was on a work computer I no longer have access to, so I can't try any solution to see if they work.
same thing happen to my 2 MacBooks, must have been an apple update.
in sys pref, it seems the shortcut is still the same.

I pressed the "restore default" button, and it worked again on both laptops