Unable to reach the license activation web site.

Please either enable internet access and press Retry

or press Cancel and select "Manual via e-mail".

This is the further I can get after a regular deactivation/activation procedure from my work desktop to my laptop. I am working on SW 2018 SP1.0.My internet connections are solid ,both on my work place and at my home 40+ Mb/sec .

I have a remote access to my work PC and now I cant even reactivate SW on it -same "helpful"  message on my work PC ( different internet provider etc.) .When  I have  tried "SW Installation manager" on both machines the message is :

"A Serial number could not be verified because of a temporary problem connecting to the server. Try again later, or continue installation without product entitlement information. You will still be able to choose the products you want to install, but you will not be able to download any installation files. If you continue without downloading enabled, you will need to provide a complete set of download source files or a DVD from which to install.

Click Back to check the serial number you entered or enter a new serial number. If you continue without a validated serial number, the Installation Manager will not pre-select the products to which you are entitled."

Any idea how to reach the SW license web site  guys?

Help please....