issues with exporting my .json

Hey guys, 

I'm trying to export a .json, however in-game it isn't showing any texture,
When trying to re-import the JSON into the model creator, it shows up with no textures (even though I textured it). With it, it also doesn't save the "Enable" texture button.

I could provide an error log, however, I don't know how to find it when using a texture pack. (If anyone could help with that.