Has anyone seen this message? I've been getting it a lot this morning and don't know who to work around. I'm trying to add another data source (SharePoint List) to an existing Power App (view).

Has anyone seen this message? I've been getting it a lot this morning and don't know who to work around. I'm trying to add another data source (SharePoint List) to an existing Power App (view).
There is a lot going on with the introduction of environments and the switch from CDM to CDS, please see blog for details.
In the call just now staff have advised to limit new development for the next couple of days.