First, is the project a legacy/production system or the beta drag and drop?
I’ve been working on a WebAPI today in the legacy/production and it works, but it isn’t using the body block.
This is a GUESS, but you might try changing the body block from a JSON string to an object. Previously, the body accepted text formatted as JSON. Try switching to to a JSON object and see if that changes anything. Again, just a guess on this one, but that is the kind of thing that changes regularly on Thunkable.
