Flutter/dart Error resolution

Job ID: 33866974

Budget: ₹600 – ₹1,500 INR

-flutter/dart app after embedding android v2 giving error:
value of 'Country?' can't be assigned to a variable of type 'Country'
try changing the type of variable

The property 'nEmpty' can't be properly unconditionally accessed because the receiver can be 'null'
try making the access conditional (using '?')
Related categories: Mobile App Development Android Dart Flutter