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Unable to activate Tedds/TSD license(s) - The underlying connection was closed

Tekla Structural Designer unexpected error occurred on a send underlying connection was closed unable to activate licenses unable to activate
Not version-specific
Tekla Structural Designer
Environment
Not environment-specific

Unable to activate Tedds/TSD license(s). The underlying connection was closed. An unexpected error occurred on a send.

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UnderlyingConnection.png

Solution: Try to activate the licenses awhile later. Make sure that you have a proper internet connection speed, finalize all the pending critical Windows updates and restart your system. 

If the problem still persists, activate the licenses from another machine using “Activate" >>  “Another Computer” option.
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activateOnAnohterMachine.png


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