I tried to place an order from PODTurbo but got the error “[Gearbubble message] Access Permission Denied.”

This is basically because you inserted the wrong Gearbubble Dropship API. You need to have Gearbubble Dropship in your Gearbubble account.

Then, you have to get the Gearbubble Dropship API from this page: https://www.gearbubble.com/users/edit

The API will be shown like this:

API Token: XXXXXXXXXXXXXXXXXXXXXXXX

Copy only the XXXXXXXXXXXXXXXXXXXXXXXX and paste it in the box on this page https://www.podturbo.com/setting