Invalid API key

We talked to your server using the API key provided, and your server explicitly informed us that the API is not authorized to access the data.

This can usually mean one of two things:

You made an error copying the API key. Make sure that there is no space character at the end of the API key and that you did not inadvertently copy a text other than the API key.
The API key is correct, but it does not have associated permissions that would grant us access to read your data. See the list of permissions necessary for Prestashop.