Why do I receive the error "Information needed to identify your computer is missing or invalid" when activating a license?

When activating a machine on my license in the License Center, I receive the following error message:

ERROR: Error
*Information needed to identify your computer is missing or invalid.

Answer 1

[MathWorks Support Team]

This error will be returned if the Host ID that you have entered is invalid. To see instructions on how to get a Host ID for your computer, click on "What is a Host ID" after clicking on the "Activate" button in the license center.

You will receive this error if you are using the Disk Serial Number of your C: drive as the Host ID if you are activating for your network license. When activating a network license, you may not use a Disk Serial Number as the Host ID. In order to activate a network license, you must use the MAC address of your network card or a static IP address.

You may also see this error if you attempt to use an IP address as your Host ID on an Individual license. Individual licenses need to use either a MAC address or Volume Serial Number.