FBX to c3t problems

I’m trying to load a 3D model from a c3t file into a Sprite3D, the fbx-conv tool converted the fbx without any problem nor warning, but when I try to load it this is the error I got:

document.h:363: rapidjson::GenericValue<Encoding, Allocator>& rapidjson::GenericValue<Encoding, Allocator>::operator[](rapidjson::SizeType) [with Encoding = rapidjson::UTF8<>; Allocator = rapidjson::MemoryPoolAllocator<>; rapidjson::SizeType = unsigned int]: Assertion `IsArray()' failed.

The model was created with blender and I believe that I’m not exporting it correctly, is any export guide that I should be looking to successfully make a model with blender and convert it to c3t? thanks!