Error while labeling & saving II

Hello,

I recently got this error while labeling. DLC crashes after.

PyNoAppError Traceback (most recent call last)
~/anaconda3/envs/dlc-ubuntu-GPU/lib/python3.6/site-packages/matplotlib/backends/backend_wx.py in _onPaint(self, evt)
751
752 DEBUG_MSG("_onPaint()", 1, self)
–> 753 drawDC = wx.PaintDC(self)
754 if not self._isDrawn:
755 self.draw(drawDC=drawDC)

PyNoAppError: The http://wx.App object must be created first!
Segmentation fault (core dumped)