When I try to create a new Target Collection, I get an "Unexpected Error" (status code: 0).
I use the example code provided for PHP from GitHub.
It is a POST request to https://api-eu.wikitude.com/cloudrecognition/targetCollection containing the name for the collection. The headers seem to be correct.
What does the error mean and how can I solve it?
Well, this is exactly what I am trying to use! See the URL in my initial post.
The manager API is only valid with a manager token which is only available on request. I created a test account for you. You find the manager token in the settings dialog of the Studio Manager.
Hope that helps,