the block cursor style is only available in COMMAND MODE when using vintage (i.e. you can navigate the document, but can't make changes with the block cursor). what you want is block cursor in the INSERT MODE. i haven't been able to find this one myself yet. but to see what that one looks like in preferences remove "Vintage" from the ignored packages, save, then hit ESC button to go into command mode (to go back into insert mode press "i").