[Legendoniance]

Hi can I get some help here? It's my first time setting up something like this, but I have done it correctly, I think. I can set up everything properly, all the configs, etc as well as the web panel for it. It's all working okay. My issue is when I try to add items to the store. I'm directly following the wiki systematically on what to do when installing the store, and I've reached the trails part. I'm having trouble importing the trails.json file in config/json-import into the store web panel, can anyone help me? I'm getting a "the upload destination folder does not appear to be writable". I am running my servers on OS X if that makes a difference. I tried chmod 777 on all relevant folders, but nothing seems to have helped. Please help me