ORA-20987: APEX - Application Express is being upgraded to a newer version.

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Hi, I've been getting the following error message for several days:

"ORA-20987: APEX - Application Express is being upgraded to a newer version. Changes to applications are disabled until the upgrade has finished."

I'm using Autonomous database in the cloud.

It prevents me from saving any change made to applications, or even create new ones.

This is absolutely impairing my capacity of work on every project and additionally, it makes it impossible even to add new users to currently deployed applications. I've exhaustively searched for a solution without result.

This is causing a devastating effect on my job.