Hi,
My client needed an update to the July '21 release of Marketing about a week ago so I helped run it for them. Everything seemed to go just fine and I got the upgrade page where it had the environment set and portal and everything but I just discovered this morning that none of the URLs work for landing pages and creating a new landing page doesn't set the URL. I also discovered that the Portal is nowhere to be found on admin.powerplatform.com. Thankfully this is only their Sandbox environment and they haven't gone live yet but it's going to create some additional work if it can't be recovered. Has anyone run into this before? I've got a Microsoft ticket sent in but just troubleshooting for ideas in the meantime: