I don't see anything wrong with the navaltech file at that line. The missing brackets causing an unknown component type called "difficulty" sounds like either data corruption or something somebody else did. I noticed the folder name is "1914 19.December.2019" which is not what it should appear after extraction; it should be "BX 1914 DH." If you've been trying to merge my mod with another one, like that one being worked on by Massimo, then I'm afraid you've vastly underestimated what it takes to do so.