Why cannot I deactivate my Trados Studio 2017 Professional license?

Question

Why cannot I deactivate my Trados Studio 2017 Professional license? 
 For offline deactivation, the message "An error has occurred" appears. After I retry, the same message still appears. 
 For online deactivation, the message "Failed to activation. The activation server cannot be connected. The request was aborted: Could not create SSL/TLS secure channel." appears. After I retry, the same message still appears. 
 Could you help me with deactivation issue so that I can use the license on another PC? Looking forw ard to your reply.

Elisa Maxim · Answer

Xu Baozhu We will be pleased to help you with this problem so have logged a support case on your behalf. We do prioritise customers who have a support contract so please keep in mind it could take up to 48 hours, especially over a weekend, but rest assured we will contact you as soon as we can. You will be contacted at the email address used for this Community. Support Case Id : 00802351 .

Elisa Maxim| RWS Group

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Trados Portfolio > 2. Licensing and Installation

Why cannot I deactivate my Trados Studio 2017 Professional license?