Database and Form Repair and completion -- 2

I need an experienced developer to repair and finish a registration form and database. Currently, we are encountering several issues that need to be resolved:

Field validation problems
Database connectivity issues
Form not submitting data
Webhook to Google sheets repaired

Ideal skills and experience:
- Proficiency in WordPress
- Experience with form handling and validation
- Strong debugging skills
- Familiarity with registration forms and associated backend processes

All information is included in the attachments. We will need to test and fix as needed.