Resolve Dependency and Package Errors in a Flutter Script

I bought a script from codecanyon with the following errors;

Running "flutter pub get" in flutter_application... Because geolocator >=6.1.4 <7.0.0-nullsafety.0 depends on geolocator_platform_interface ^1.0.8 which depends on plugin_platform_interface ^1.0.2, geolocator >=6.1.4 <7.0.0-nullsafety.0 requires plugin_platform_interface ^1.0.2. (1) So, because firebase_core_platform_interface >=4.0.0 depends on plugin_platform_interface ^2.0.0 and google_map_location_picker >=4.1.3 depends on geolocator ^6.1.14, firebase_core_platform_interface >=4.0.0 is incompatible with google_map_location_picker >=4.1.3. Because google_map_location_picker <2.0.1 depends on intl ^0.15.8 and google_map_location_picker ^2.0.1 depends on intl >=0.15.8 <=0.16.0, google_map_location_picker <3.0.0 requires intl >=0.15.8 <=0.16.0.
And because google_map_location_picker >=3.0.0 <3.3.1 depends on intl ^0.16.0 and google_map_location_picker >=3.3.1 <4.1.3 depends on intl >=0.16.0 <=0.16.1,


C:\flutter\.pub-cache\hosted\pub.dartlang.org\cloud_firestore-0.5.0\android\src\main\java\io\flutter\plugins\firebase\cloudfirestore\CloudFirestorePlugin.java:481: error: cannot find symbol public void onFailure(@NonNull Exception e) {