The Episerver update 189 releases CMS 11.1.0 and Commerce 11.4.1. The latest version of Commerce can however not be used with the latest version of CMS.
EPiServer.CMS.Core (≥ 10.10.4 && < 11.0.0)
Is this on purpose?
Yes. CMS 11.1.0 requires Commerce 11.5.0, which we are working on. It will probably be released later this week.