Hello,

To move your license to a new machine you have to release it. Go to the "My Licenses" menu, select the license you want to release and click the Release Licenses button. After that, you should be able to install your licenses in a new machine.

This is because the license is not correctly assigned. Please be sure you release the license from other computers before installing it to a new computer. Then reinstall the license server and make sure Windows Defender or your antivirus is not blocking the installation. Find instructions HERE.