My Flutter SDK is:
Flutter (Channel stable, 3.27.4)

but I get the error:

Because every version of flutter_localizations from sdk depends on collection 1.19.0 and livekit_client 2.4.1 depends on collection ^1.19.1, flutter_localizations from sdk is incompatible with livekit_client 2.4.1.
And because every version of openim_live from path depends on livekit_client 2.4.1, flutter_localizations from sdk is incompatible with openim_live from path.
So, because gecko depends on both flutter_localizations from sdk and openim_live from path, version solving failed.