i am trying to make my first app in fluttet "Error on line 46, column 15: Mapping values are not allowed here. Did you miss a colon earlier?"

Question

enter image description here cupertino_icons: ^1.0.2

STATE MANAGEMENT

mobx: ^2.0.3 flutter_mobx: ^2.0.1 dev_dependencies: flutter_test: sdk: flutter mobx_codegen: ^2.0.2 build_runner: ^2.2.0

Answer 1

try upgrade your package cmd "flutter pub upgrade"

Answer 2

You need to insert space in front of mobx_codegen.

So you pubspec needs to look like this:

dev_dependencies:
  flutter_test:
    sdk: flutter
  mobx_codegen: ^2.0.2
  build_runner: ^2.2.0

Answer 3

Try the following code:

dev_dependencies:
  flutter_test:
    sdk: flutter
  mobx_codegen: ^2.0.2
  build_runner: ^2.2.0