An API key error indicates that the pixx.io feature/add-in you want to use has not (yet) been activated for your pixx.io account.
Some pixx.io features (e.g. Clarifai interface / pixx.io portal) or extensions (Add-Ins) may have to be purchased additionally. Only after receiving the order confirmation the feature/add-in will be activated for your pixx.io account. Please check your pixx.io order confirmation whether the corresponding feature/add-in is included for your pixx.io account.
If the usage is included, or if you have added the feature later and received your own order confirmation, please contact firstname.lastname@example.org with the order confirmation number (AB-XXXX).
We will check your order confirmation and, if necessary, activate the feature for you. Once this has been done, you will have to confirm the activation with a one-time admin login in the browser interface of your pixx.io instance.
Now you should be able to use the desired feature/app.