![pubspec.yaml has no lower-bound SDK constraint. You should edit pubspec.yaml to contain an SDK constraint - Nisrulz/Flutter-Examples pubspec.yaml has no lower-bound SDK constraint. You should edit pubspec.yaml to contain an SDK constraint - Nisrulz/Flutter-Examples](https://user-images.githubusercontent.com/24958765/113087682-bcd5dc00-9216-11eb-9dc8-5add3cb4bfae.png)
pubspec.yaml has no lower-bound SDK constraint. You should edit pubspec.yaml to contain an SDK constraint - Nisrulz/Flutter-Examples
![Why my pubspec.yaml file not working and contain a class R iam not writing this class? - Stack Overflow Why my pubspec.yaml file not working and contain a class R iam not writing this class? - Stack Overflow](https://i.stack.imgur.com/sdsnh.png)
Why my pubspec.yaml file not working and contain a class R iam not writing this class? - Stack Overflow
![Flutter: How to fix “Error on line 41, column 11 of pubspec.yaml: Mapping values are not allowed here.” | by Tashinga Pemhiwa | Medium Flutter: How to fix “Error on line 41, column 11 of pubspec.yaml: Mapping values are not allowed here.” | by Tashinga Pemhiwa | Medium](https://miro.medium.com/max/862/1*BadUWdfjVPf-U4JTXJ2Fdw.png)
Flutter: How to fix “Error on line 41, column 11 of pubspec.yaml: Mapping values are not allowed here.” | by Tashinga Pemhiwa | Medium
![IntelliJ should show pubspec validation errors in-line in the yaml editor · Issue #31861 · dart-lang/sdk · GitHub IntelliJ should show pubspec validation errors in-line in the yaml editor · Issue #31861 · dart-lang/sdk · GitHub](https://user-images.githubusercontent.com/1269969/34836679-7a3b0f62-f6ad-11e7-9089-e872ce1c1208.png)