cielting error in console: Mixed Content: The page at 'https://www.amzwizard.cc/wp-admin/admin.php?page=Buttonizer&welcome-splash=true#/' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://www.amzwizard.cc/wp-json/buttonizer/dashboard?nonce=0dda389771'. This request has been blocked; the content must be served over HTTPS. The website has enabled compulsory SSL. Now it's blank on the plug page.
James Hi cielting , Thanks for all of the screenshots! It seems like the WordPress function get_rest_url() is returning your site's URL without https://. Could you check if your site has https:// on both WordPress Address (URL) and Site Address (URL) under Settings -> General ?