Yes. I also noticed in a network trace in chrome I am getting 404 on https://api.bap.microsoft.com/providers/Microsoft.BusinessAppPlatform/environments/~default?api-vers...
This seems to be centered around not having a Powerapps Plan 2 license. I could login to admin.powerapps.com but could not see or manage any environments, I assigned a trial license to my admin user, logged in and viewed my environments, our main default environment now has <<TennantName>> (Upgrade) denoted in the name, I have no option to upgrade it. However, after logging in, my editors can now login and view their apps. Seems like something was caught up in the backend.
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