Once you have a self-hosted /e/ hosting server running, how do you do updates? Is it automatic? Do you have to go in and update manually? I know when I look, it says that the Nextcloud version is no longer supported, and it lists many of the /e/ apps as not being compatible with the new version…
It is a specific process, usually handled by an upgrade guide.
So you’ll have to wait for /e/ team to publish a new release (or ask for it with a Gitlab issue).
Meanwhile, please refrain updating your selfhosted by your own, you may break the official upgrade process.