I would like to give product mafia a try. I have faced the same issue.
* installed a fresh copy of WordPress + WooCommerce.
* Enabled “legacy REST API”
* added a new REST API Key, which i’ve copied and pasted the Website, Consumer and Secret into ProductMafia WooCommerce Setup.
The error provided is the same: “API Test failed – your credentials appear to be invalid”
As I’m setting up the site for the 1st time, i’m yet to enable SSL. Could this be causing the problem?
Please review your logs, the website i’m trying to add is delosfashion dot com
I have messaged you on Facebook also since we already have a conversion open there. Can you please send me a screenshot of your product mafia account settings so I can try and troubleshoot the connection and see where you went wrong.