Hi
I had the same issue in my post here: [Solved] Unable to Import Blender Models & Textures - #5 by bdmoakley
The problem is Blender 2.8. You need to uninstall Blender 2.8 and install 2.79 instead, and that will fix your issue.
Once you have installed Blender 2.79, you need to reimport all the models again.