Fatal Error related to "stockswitch"

[CenkTheRaptor]

Specifically, it says No subtypes found on ModuleB9PartSwitch (moduleID='StockSwitch') on part.
link to the log:
https://www.dropbox.com/scl/fi/7abuvrdzy4ouee70cq22h/KSP.log?rlkey=suuhrb10vrcfjpp3031nkkpf7&st=3ckw2p6w&dl=0