A solution here. My 3d camera Tracking and Warp Stabiliser VFX were not linking with Dynamic link and I was getting UNABLE TO OBTAIN DYNAMIC LINK PROJECT.
After a long time with adobe it came down to one old .jsx java script loaded in AE to load a default project template. So just check your imported scripts. This worked on 3 versions of AE on 2 different machines. Hope that helps
Thanks for sharing what worked for you. That's really interesting. I wonder how many of these kinds of errors could have been solved with that. I'll definitely try to remember this one for future forum posters.