Eel Narmstrong

HELP!! so I'm trying to use trajectories mod with KOS and I know there's a problem with it. As simply as possible how do I fix this. I've spent 50 minutes trawling through the Github page getting more and more confused. can someone give me step by step instructions on how to fix my problems. Thanks! (If it helps I'm using CKAN on ksp version 1.4.1.2089, skan version 1.25.1, kos version 1.1.5.2, and trajectories version 2.2.0). please help or my falcon9 is gonna keep landing in the ocean!!