I'm able to pack the app but after I upload the new zip file I get an email saying that the app could not be published. No detailed message why.
App packed successfully at /dist/mrp-freshdesk-app.zip Upload this file to the marketplace by following the instructions at https://developer.freshdesk.com/v2/docs/freshdesk-apps/ ✨ Done in 2.34s.
I believe this issue was addressed for you through a support ticket that pointed out that there were unexpected extraneous files in your App Zip package. Do let us know if you still need help here.