Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: @GoPro your UX online is appalling! No clear save button, not being able to use any generic TLD's #unhappy
This tweet contains emotions: 
anger, disgust, sadness