Hi! I have the same problem here and it doesn't let me choose any option either... :c
Please look at this comment! ^^
Clicking "rollback" will just revert the game back to a playable moment in time; it won't let you bypass the error. Clicking "ignore" will let you bypass the error, however, it's likely that it will crash the game as well.
Hiya!! I'm sorry this is happening T_T Can you try deleting all previous versions of 14DWY (including Day 4, Day 3.5, Day 2, etc.) from your computer and redownloading the newest version again?
Old save files won't work as well since a lot of the code has been updated, so you may be better off deleting them (or saving over them).