Can't connect to server to activate licence


I am trying to open our 25 school lab PCs accessible for all users. I configured the PCs as per the instruction in the link below and it is working for any users if I connect the network with mobile data only.

I know that our school network was restricted for LightBurn website. So recently we whitelisted the website However, still it can’t be connect to the server. Is there any other website I need to whitelist?


Make sure they whitelist the correct ports - it’s HTTPS, not HTTP, but that should be it.

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