What is the solution to errors we encountered during the Embedded Sign-up Flow?

What is the solution to errors we encountered during the Embedded Sign-up Flow?

Below are some possible errors that may occur during the Embedded Sign-up Flow,

1. Business Manager Account Creation Errors
2. WhatsApp Business Account Creation Errors
3. Phone Setup Errors
4. Phone Verification Errors

You may identify the error here and find out the solutions accordingly.