I have created a case, but whilst I wat for someone to investigate, thought I would ask here to see if anyone else is having the same issue.
Normally when a workspace gets created through control centre, the service account is assigned as owner, with the project manager, sponsors, and key stakeholders assigned with the relevant permissions. For some reason on Wednesday, the control centre only assigned the service account as the owner to a newly approved project, meaning no-one has permission to the workspace. I have created a couple of further test projects, and the same has happened. Not sure if this is linked to the recent parent folder issue or not, but thought it was worth asking if others have had the same issue and if there is a solution?
FYI - There seems to be further issues with links/url for the newly created workspace, so it isn't usable atm.