Sorry to hear of your misfortune, a picture would help but if crack is not to big you can layer this tape
and patch up opening.
Tape comes 6" wide and it will stick very good to hold everything together.
Layer tape so wind blows over the layers.
If your opening is flexing if push toward sidewall maybe the cap can be reattached in spring with some help.
A good fiberglass shop can do wonders and after paint you would forget it ever happened.
Welcome to the forums.
Bless your beautiful granddaughter.