Error 1054 when parsing project

This error was reported on the Zulip chat.

 "status": true,
    "code": 1054,
    "source": "Property Node (arg 1) in Lv Proj Document Type.lvlib:Project Parser.lvlib:Check if Register For event is DQMH Style.vi->Lv Proj Document Type.lvlib:Project Parser.lvlib:Parse Helper Loops.vi->Lv Proj Document Type.lvlib:Project Parser.lvlib:Get Dqmh Module Info.vi->Lv Proj Document Type.lvlib:Project Parser.lvlib:Dqmh Module.vi->Lv Proj Document Type.lvlib:Project Parser.lvlib:Bin Library.vi->Lv Proj Document Type.lvlib:Project Parser.lvlib:Parse Library References for Documentable Types.vi->Lv Proj Document Type.lvlib:Project Parser.lvlib:Project.vi->Lv Proj Document Type.lvlib:Lv Proj.lvclass:Parse.vi->antidoc.vi"

Seems related to the Helper Loop parsing.