Plot rendering error: list index out of range; metadata = {'Entries': 19877, 'Name': 'OccupancyDist-5', 'Overflow': 4404.0, 'Type': 'Histo1d', 'Underflow': 129319.0, 'x': {'AxisTitle': 'Occupancy', 'Bins': 49, 'High': 49.5, 'Low': 0.5}, 'y': {'AxisTitle': 'Number of Pixels'}, 'z': {'AxisTitle': 'z'}}