sonderskov1980

Hello After buiding the 42030 i found the steering to be bad and found ths page on the interet discussing the problems with the steering. I am a total beginner so i hope some of you could help explain to me why i get 3 errors when i import Effermans lxf file into rebrickable?? It is regarding: 6 x 32123a 1x 32053 1 x 32052 Apparently they are not part of any sets. If they really exist I do not know Best regards René