This has happened to me multiple times before. Can you sorta slip your fingers beneath the hood? If so, try this:
1. Keep your fingers ready to pull up the hood.
2. Use your other hand to open the frunk using the app.
3. Start pulling up gently right before you hear the popping sound.
If successful, your frunk should now be open. If not, it takes a few tries. This happens to me when I accidentally stuff it up too much during trips.