Error when I use the exemple plugin ARAPluginDemo in Projucer

I have error C2556 with message

juce::AudioProcessor *juce::createPluginFilterOfType(juce::AudioProcessor::WrapperType)’ : la fonction surchargée ne diffère que par le type de retour de ‘std::unique_ptr<juce::AudioProcessor,std::default_deletejuce::AudioProcessor> juce::createPluginFilterOfType(juce::AudioProcessor::WrapperType)’|ArpeggiatorPlugin_SharedCode|D:\Program Files\JUCE\modules\juce_audio_plugin_client\utility\juce_CreatePluginFilter.h|38

Do you have idea for resolving this message ?