Sorry for being absent for months. I had to organize a stronger machine to keep on modding.
This crash can be caused by more than one single issue. First: Try to use Blender 2.74 or v.2.75a, instead of the newest blender build.
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Than have a look, on my tutorial how to export .fbx files **from blender (before importing them into the Ark Dev Kit). [TUTORIAL] Export FBX Blenderfiles (v.2.74) into the Ark Dev Kit (first: STATIC MESH only) - ARK: Survival Evolved - Epic Developer Community Forums
As soon as you (or everyone else) have tried out and/or checked everything I mentioned above, it should be working.
Regards