Amazon Review Import not Working

Despite setting up the tool correctly with the secret key and working according the explanation video on youtube, I keep getting an error message while trying to import an amazon review.
The error says: “Your site must have WooCommerce Photo Reviews(v1.1.4.8 or later) installed and active” The Plugins version is 1.1.5.4, it’s purchased, installed and active. How can we solve this issue?

Thanks in advance