Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
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