Listing promotion requires at least one asset format ?

Summary

Can’t publish my assets because of this message “Listing promotion requires at least one asset format.”

What type of bug are you experiencing?

Publishing

Steps to Reproduce

Fill the publish form and hit the Submit for review button.

Expected Result

Submit for review not canceled.

Observed Result

Getting “Listing promotion requires at least one asset format.”

Platform

Firefox

Operating System

Windows

Additional Notes

Not sure but I’ve only included a zip file as it’s a song bundle.
Do I really need to create one unreal/unity file for each engine version for a *.wav bundle ?

I don’t know if you need to do that but the question is whether you want to do it. Sales will be a lot better if you create an unreal engine and unity version. And it isn’t really a huge effort to create them.