Hey, It seems WooCommerce plugin is not active on your wp-admin. Enhanced ecommerce plugin can only be activated if you have active WooCommerce plugin in your wp-admin.

{"id":6,"name":"Christian Rusch","url":"","description":"","link":"https:\/\/periosafe.de\/author\/christianrusch\/","slug":"christianrusch","avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/98e7b141d7e9ac65802904b9b428e749?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/98e7b141d7e9ac65802904b9b428e749?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/98e7b141d7e9ac65802904b9b428e749?s=96&d=mm&r=g"},"meta":[],"_links":{"self":[{"href":"https:\/\/periosafe.de\/wp-json\/wp\/v2\/users\/6"}],"collection":[{"href":"https:\/\/periosafe.de\/wp-json\/wp\/v2\/users"}]}}