I think this was after recently upgrading to latest as at today.
2021-05-04 15:10:27,018 - octoprint.util.comm - ERROR - Error while processing hook excluderegion for phase queuing and command G0 Z-10:
Traceback (most recent call last):
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint/util/comm.py", line 4519, in _process_command_phase
tags=tags,
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint/util/init.py", line 1941, in wrapper
return f(*args, **kwargs)
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_excluderegion/init.py", line 714, in handleGcodeQueuing
return self.gcodeHandlers.handleGcode(cmd, gcode, subcode)
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_excluderegion/GcodeHandlers.py", line 223, in handleGcode
return method(cmd, gcode, subcode)
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_excluderegion/GcodeHandlers.py", line 252, in _handle_G0
return self.state.processLinearMoves(cmd, extruderPosition, feedRate, z, x, y)
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_excluderegion/ExcludeRegionState.py", line 666, in processLinearMoves
self.position.Z_AXIS.setLogicalPosition(finalZ)
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_excluderegion/AxisPosition.py", line 156, in setLogicalPosition
self.current = self.logicalToNative(position)
File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_excluderegion/AxisPosition.py", line 192, in logicalToNative
value += self.current
TypeError: unsupported operand type(s) for +=: 'float' and 'NoneType'