Cross-listing and re-listing are not the same. You can cross-list a platform but this doesn't mean you can relisting. We will also support all platforms we support for cross-list for relisting. If you are getting this error, you just have to wait.
"Re-list action is currently not supported for E-bay/Etsy/Facebook" error is given when you try to do this on the platform that we do not support the relisting feature.
How to resolve this error?
You should wait, when we support relisting feature on new marketplace, we will send email you.