The primary custom script module for this mission, ganbatte.osm, has a problem that can sometimes prevent it from loading properly. This sounds like the problem you are facing, though it is unrelated to T2Fix or any of the standard third-party scripts it includes. To resolve this particular problem, you should be able to drop (https://drive.google.com/file/d/100nAgGKbF0ii7kCr5d8YNUR1swyFrLyX/view) this version of the affected module into the FM's install directory.