Trados Studio 2017 Freelance Plus <offline deactivation>

Hi,

I would like to deactivate my license, Trados Studio 2017 Freelance Plus.
I attempted an offline deactivation, but the following error message appeared:

"Deactivation failed.
The request was aborted: Could not create a secure SSL/TLS channel."

Could you please advise me on how to resolve this issue?

Best regards,

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