Mode Art Design review for Walmart Marketplace

Products in app page shows ready to publish. No validation errors. Nothing happens when I click Publish. No validation or publish errors after hitting publish button. Clearing cache, using different browsers, using different devices, uninstalling and installing app back or disconnect and connect back always results same. Problem is the app itself but no response to any support request. No update or improvement on the app. If you care business continuity this app totally an issue. Since it doesn't work at all, I will uninstall and find a better reliable way.