Errors often occur during annotation

[CalvinSMU]

Traceback (most recent call last):
File "F:\Project\Segment_Anything\segment-anything-annotator\canvas.py", line 514, in mousePressEvent
self.app.clickManualSegBox()
File "F:\Project\Segment_Anything\segment-anything-annotator\annnotator.py", line 862, in clickManualSegBox
group_id=self.getMaxId() + 1,
File "F:\Project\Segment_Anything\segment-anything-annotator\annnotator.py", line 704, in getMaxId
max_id = max(max_id, label.shape().group_id)
TypeError: '>' not supported between instances of 'NoneType' and 'int'

[haochenheheda]

Fixed.