Why keyboard shortcut "ctrl + left" doesn't work? I'm used to switch between my desktop spaces using ctrl + arrows. But ctrl + ← doesn't work while ctrl + → works fine.

Here is my settings:
To solve this problem:


Change keys for shortcut to ⌘CMD + ← (or anything else). But it won't work after that yet.
Reboot your mac.
⌘CMD + → now is working.
Change keys to ctrl + ←.