Collision/sewing error, Blender 2.91.0

[JoshCodeStuff]

Steps:
1: Added character (MB-Lab)
2: Turned on collision while selecting character mesh
3: added plane
4: turned on cloth (in the MC menu)
5: sized plane and in edit mode duplicated it to the back
6: selected vertices I wanted to sew and clicked sewing lines
7: This error is thrown

Attached a picture of my plane setup

Python: Traceback (most recent call last):
  File "C:\Users\LtPinecone\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\MC_29-main\MC_29.py", line 4449, in execute
    cloth = MC_data['cloths'][ob['MC_cloth_id']]
KeyError: 'bpy_struct[key]: key "MC_cloth_id" not found'

location: <unknown location>:-1

[JoshCodeStuff]

Blend file:
Test1.zip

[Ceztio]

have you tried to join those 2 planes together?

[JoshCodeStuff]

have you tried to join those 2 planes together?

Yes. To no avail. I have not tried in awhile so I will give it another try.

[NorthMountGames]

Click "cloth" again in edit mode.
Select vertices using edge. (or use either method. )
Finally, click on "sew lines"

[NorthMountGames]

Click "cloth" again in edit mode.
Select vertices using edge. (or use either method. )
Finally, click on "sew lines"

I found this by accident, and I would say it's a complicated way ...

[JoshCodeStuff]

Click "cloth" again in edit mode.

This seems to crash The latest Blender Version.