The error message:

Sep 18 16:09:52 zynthian startx[1116]: ERROR:zynthian_state_manager.save_snapshot: Traceback (most recent call last):
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 954, in save_snapshot
Sep 18 16:09:52 zynthian startx[1116]: state = self.get_state()
Sep 18 16:09:52 zynthian startx[1116]: ^^^^^^^^^^^^^^^^
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 906, in get_state
Sep 18 16:09:52 zynthian startx[1116]: self.save_zs3("zs3-0", "Last state")
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 1420, in save_zs3
Sep 18 16:09:52 zynthian startx[1116]: mcstate = self.get_midi_capture_state()
Sep 18 16:09:52 zynthian startx[1116]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 1622, in get_midi_capture_state
Sep 18 16:09:52 zynthian startx[1116]: mcstate[uid]["midi_cc"][chan_cc].append([zctrl.processor.id, zctrl.symbol])
Sep 18 16:09:52 zynthian startx[1116]: ^^^^^^^^^^^^^^^^^^
Sep 18 16:09:52 zynthian startx[1116]: AttributeError: 'NoneType' object has no attribute 'id'
Sep 18 16:09:52 zynthian startx[1116]: Traceback (most recent call last):
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 954, in save_snapshot
Sep 18 16:09:52 zynthian startx[1116]: state = self.get_state()
Sep 18 16:09:52 zynthian startx[1116]: ^^^^^^^^^^^^^^^^
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 906, in get_state
Sep 18 16:09:52 zynthian startx[1116]: self.save_zs3("zs3-0", "Last state")
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 1420, in save_zs3
Sep 18 16:09:52 zynthian startx[1116]: mcstate = self.get_midi_capture_state()
Sep 18 16:09:52 zynthian startx[1116]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 18 16:09:52 zynthian startx[1116]: File "/zynthian/zynthian-ui/zyngine/zynthian_state_manager.py", line 1622, in get_midi_capture_state
Sep 18 16:09:52 zynthian startx[1116]: mcstate[uid]["midi_cc"][chan_cc].append([zctrl.processor.id, zctrl.symbol])
Sep 18 16:09:52 zynthian startx[1116]: ^^^^^^^^^^^^^^^^^^
Sep 18 16:09:52 zynthian startx[1116]: AttributeError: 'NoneType' object has no attribute 'id'
Sep 18 16:09:52 zynthian startx[1116]: ERROR:zynthian_state_manager.save_snapshot: Can't save snapshot file '/zynthian/zynthian-my-data/snapshots/000/023-try3.zss': 'NoneType' object has no attribute 'id'