Apply Settings node freezes the editor

I’m attempting to create an options menu for the first time, but I’m finding that the instant I click my “Apply” button, the entire Unreal Engine editor becomes completely unresponsive and I have to force quit the program. I’ve removed every other related node to make sure nothing else is interfering, but it still crashes with just the ones shown. The Command Line Override bool doesn’t change anything either.
I’m using v5.0.3 on an Intel Mac, OS 11.6.7

Any idea what would cause this or how I can avoid it?