What have you done for trouble-shooting so far?
Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:
I am a Mac user myself, so I can’t make a clear statement on this, but I wonder if an OS-sided plug-in or setting may be intercepting the input.
It's so weird, all of my hotkeys from the keyboard shortcut menu just...vanished, it's empty..
Please post s screenshot.
Have you tried resetting »Photoshop Defaults« in Edit > Keyboard Shortcuts?
Have you changed any setting in the system or creative cloud? like language. if so, you could try this:
first, open the folder, which where your photoshop install on. And you will see a folder called locales "Locales".
And in Locales, there are a folder or many folder named for language. And get in a folder matched your photoshop's language.
For example, if my ps' language is English, I will get in the en_US and if is Japanese, I will get in the ja_JP.
when you get the correct path, get in support Files > Shortcuts>Win. You'll see a file, "Default Keyboard Shortcuts.kys". Cut(not copy and paste) to anywhere, like the desktop.
Then run the photoshop, it might be warning you, ignore it and close ps. and move back the file" default......" to the original path.
Final, run ps again.
note: if it does not work still. you can try to delete whole folder "Locales" and reinstall ps...