Deactivation not possible, online as well as offline

Essentially, I want to deactivate my licence for Studio 2019 on an old computer, to then activate it on the new computer.

Deactivating within Trados on the old computer gives the message: Revocation is either complete or a revocation proof is already uploaded. I don't know why, as I haven't revoced the licence yet (I can still use it)

Next, I tried offline deactivation. I clicked on Generate Deactivation Authorization Ticket. Now it says Deactivation Initiiated, but no further information on what happens next or how to proceed.

Help would be greatly appreciated.

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