Traceback (most recent call last):


 "/usr/local/lib/python3.6/site-packages/distributed/core.py", line 528, in handle_comm

result = await result


 "/usr/local/lib/python3.6/site-packages/distributed/scheduler.py", line 2209, in remove_worker

address = self.coerce_address(address)


 "/usr/local/lib/python3.6/site-packages/distributed/scheduler.py", line 4950, in coerce_address

raise TypeError("addresses should be strings or tuples, got %r" % (addr,))
TypeError: addresses should be strings or tuples, got None

Traceback (most recent call last):


 "/usr/lib/python3/dist-packages/spyder/widgets/helperwidgets.py", line 127, in paint

textRect = style.subElementRect(QStyle.SE_ItemViewItemText, options)
TypeError: subElementRect(self, QStyle.SubElement, QStyleOption, QWidget): not enough arguments
