WhatsApp is closing unexpectedly

Hello juliannivasc,

If an app on your iPhone or iPad doesn't work as expected, you can try to resolve the issue by completing the steps here: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support

You may find these steps helpful:

1. Close and reopen the app

2. Restart your device

3. Check for updates

4. Delete the app, then redownload it

You can see more detail about those steps in the article we mentioned above.

It looks like you're already followed those steps, if they don't resolve the issue we recommend reaching out to the app developer: How to contact an app developer - Apple Support

Thanks.