Fix isses in my flutter app. - Flutter (dart), node.js and firebase

I have a couple issues I need fixed in my flutter app.

Screen recording of issue: https://youtube.com/shorts/iB7IlSd9iLU?si=afEk9Z0eG6f4aD_P

1) Registration doesn't properly complete on last step after profile photo is completed it says (Unexpected end of form) - Although account still gets created in firebase,

2) My bottom android menu is getting in the way of elements on the app during certain registration steps.

*Your interest*
*tell us more*
*Years Celibate*

If you can fix these successfully I have more ongoing fixes I'll need afterwards.

NO VIBE CODING ALLOWED.
After completion I need to push updated code to the repository and generate a new .AAB file.