Thanks for this last reply, I'm new to Dropsource and I've been following the tutorial which @sue provided, thank you Sue! It was very helpful but the missing section required IF you're going to be connecting to Bubble's development API's is this modification of the json file which you mentioned.
I changed the section below in the first line as mentioned:
And updated the API in Dropsource as you described, now I can make the requests to the Dev version rather than the Live. I had the same problem as @rkresnadi
Maybe Sue's post could be updated, many thanks.