Hi Erika thanks for the reply.
I was going to elaborate further since ticking the "Write Spine JSON" didn't work.
However I only just realized that I had over looked a hidden layer, I thought I had all layers unhidden but I was wrong (and yes I feel silly lol). The export works just fine and I got my JSON file.
And on that note, I'll highlight myself as one of the people who would like a "ignore hidden layers" feature, I noticed the Photoshop version of this script is alot better.
Anyways thanks for help Erika