Yes, its installed in the same machine.The error probably means the license server uses a certificate that is not trusted on the client. Is the license server on the same machine as the control builder and does it work for other licensed features?
Thanks for your response, Will check tomorrow and update you.There's i think 3 different ways to install the license server. If you are using the Microsoft IIS you should have a link to the website like "License Assignment Editor". If you open this link do you get any error for the certificate? Normally browser will show like a green lock or similar next to the URL