Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @pottermore : I can't find my patronus, the website doesn't work, I can't even see the questions.... #sadness...
This tweet contains emotions: 
pessimism, sadness