Very often, especially when Premiere is open, Photoshop just hangs when the Windows Open File Dialog is requested. It can't be closed, restart is the only solution to this. Also happens when you'd like to save a document and in this case, you'll lose your work. You can clearly see the 'fontsize' dialog on top. My guess is the Open File dialog is hidden behind the main screen (modal) but since it's invisible, you're toast. This should not happen in 2022!