UE5 - C4D R15.008 compatibility isse?

I have crated a model in C4D R15 and want to import it to UE5. I am getting numerous errors and cannot save the entire UE5 file.

I used two approaches:

  1. Export C4D to .obj and import that to UE5. I was able to get it to show up in the edit view and work with it, but could not Save All as many …MAT files could not be found.

  2. Then i imported the actual C4D file with the TechSmith plugin. That produced a series or errors and it never imported correctly.

What is going on?
Are the two versions not compatiple?
Or do i need to change something in the Importer options?

Any help is appreciated!