problems loading api.ai

[misturlee]

Severity Code Description Project File Line Suppression State
Error Could not install package 'ApiAi 1.0.4'. You are trying to install this package into a project that targets 'MonoAndroid,Version=v6.0', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author. 0
i keep getting the above error when i try to use nuget to get it...please help