I'm new here.
I just tried to import the package at the unity and got those 2 messages:
Assets\Naninovel\Runtime\Input\InputSampler.cs(12,33): error CS0738: 'InputSampler' does not implement interface member 'IInputSampler.GetInputStartCancellationToken()'. 'InputSampler.GetInputStartCancellationToken()' cannot implement 'IInputSampler.GetInputStartCancellationToken()' because it does not have the matching return type of 'CancellationToken'.
Assets\Naninovel\Runtime\Input\InputSampler.cs(12,33): error CS0738: 'InputSampler' does not implement interface member 'IInputSampler.GetInputEndCancellationToken()'. 'InputSampler.GetInputEndCancellationToken()' cannot implement 'IInputSampler.GetInputEndCancellationToken()' because it does not have the matching return type of 'CancellationToken'.