Suddenly getting Error 1170 during engine update

[Kanori24]

ERROR(1170): Non-vanilla node detected. Please ensure that the folder name in "behavior_templates/" folder is same as one of the behavior file without the extension. Please contact the template creator | Template: ch | File: behavior templates\ch\mt_behavior#1227.txt

This came on rather suddenly after I checked the patch in Nemesis for UltimateCombat/TK Dodge. I didn't even have to update the engine for that. Afterwards, it is relentlessly giving this error and refusing to budge, and all I want to do is take out MOMO Acrobatic Jump for a while. I read the error message thoroughly but couldn't find what it is talking about. I tried deleting the file it's referencing there, #1227, but then it said something about file #1755, so I deleted it as well. After that, Nemesis just closes when trying to update.

I have no idea who created template ch, so I can't contact them. It's included with everything in Nemesis, so...?