The current Dart SDK version is 3.6.1.Because xxx depends on date_format ^1.0.1 which doesn't support null safety, version solving failed.
The lower bound of "sdk: '>=1.20.1 <2.0.0 or >=2.0.0 <3.0.0'" must be 2.12.0 or higher to enable null safety.
For details, see https://dart.dev/null-safetyYou can try the following suggestion to make the pubspec resolve:
* Try updating the following constraints: dart pub add date_format:^2.0.9 http:^1.4.0
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