Pad Lighting from Reaction?

I feel like I've been learning very quickly, but now I've got a question that I think would benefit from someone who knows more specifics about reaction definitions.

My controller (Behringer CMD DC-1) template has a 4x4 pad grid, which corresponds to a Session Box. This all works great.

What I'd like to be able to do is have the pads light solid (vel 01) if there's a clip loaded into that spot, and light blinking (vel 02) if that clip is playing.

I tried setting up the following reaction to light up pads with clips:
Listener: Clip Slot's has clip value has changed
Action: MIDI Controller - send raw MIDI data to controller; MIDI Bytes: 01

I load that into Live, but when I start Live, the script won't load, and the CSS log gives me this info:

Traceback (most recent call last):
File "", line 1, in
File "/Applications/Ableton Live 11 Suite.app/Contents/App-Resources/MIDI Remote Scripts/css_dc_1_script_01/__init__.py", line 2, in
from .css_dc_1_script_01 import css_dc_1_script_01
File "/Applications/Ableton Live 11 Suite.app/Contents/App-Resources/MIDI Remote Scripts/css_dc_1_script_01/css_dc_1_script_01.py", line 1133
self._send_midi(01)
^
SyntaxError
:
invalid token
Traceback (most recent call last):
File "", line 1, in
File "/Applications/Ableton Live 11 Suite.app/Contents/App-Resources/MIDI Remote Scripts/css_dc_1_script_01/__init__.py", line 2, in
from .css_dc_1_script_01 import css_dc_1_script_01
File "/Applications/Ableton Live 11 Suite.app/Contents/App-Resources/MIDI Remote Scripts/css_dc_1_script_01/css_dc_1_script_01.py", line 1133
self._send_midi(01)
^
SyntaxError
:
invalid token

Any thoughts on what I'm doing wrong here?