I have taken my app to flutter and has 6 problems pls fix this

1

The supplied phased action failed with an exception.

Could not create task ':google_sign_in_android:compileDebugUnitTestSources'.

this and base files have different roots:

.

2

The supplied phased action failed with an exception.

Could not create task ':google_sign_in_android:compileDebugUnitTestSources'.

this and base files have different roots

.

3.The return type 'int?' isn't a 'FutureOr<int>', as required by the closure's context.

4. Undefined name 'queryParameters'.

   Try correcting the name to one that is defined, or defining the name.

5.The getter 'location' isn't defined for the type 'GoRouterState'.

Try importing the library that defines 'location', correcting the name to the name of an existing getter, or defining a getter or field named 'location'.

6.The getter 'location' isn't defined for the type 'GoRouter'.

Try importing the library that defines 'location', correcting the name to the name of an existing getter, or defining a getter or field named 'location'.