ERROR: Undefined class 'WidgetStatesController'.

[SauceWu]

Missing files
.pub-cache/hosted/pub.dev/flutter_hooks-0.21.0/lib/src/widget_states_controller.dart:7:1: Error: Type 'WidgetStatesController' not found.

[rrousselGit]

Your Flutter version needs to be at least >=3.19.0-0.3.

[tengl]

I get this as well, latest Flutter. flutter_hooks version 0.21.0.

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.19.4, on Pop!_OS 22.04 LTS 6.6.10-76060610-generic, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 2022.2)
[✓] VS Code (version 1.87.2)
[✓] Connected device (4 available)
[✓] Network resources

• No issues found!

[rrousselGit]

This change requires using the Flutter master channel. It's quite new

[rrousselGit]

I'm retracted 0.21 and released a 0.21-pre with updated SDK constraints