Deactivation issue

We need to update TCP to 2.5.6 from 2.5.5, and we get the issue of ‘Download failed. Unauthorized‘.

I wanted to remove the licence and add in again (the typical ‘turn it off and on again’ approach) but when I do, I get a message saying ‘licence key deactivated’ but the licence status still says it is Active, as if this doesn’t work?

Can anyone shed any light?

A screenshot can be found at: https://imageupload.io/en/Y0fnOzqd08uvWC3