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Invalid (inconsistent) license key. The license-key and data for the feature do not match.
There are two reasons you might receive this error message.
1. The License Server was just updated with a new license file and the "Client" machine has a copy of the previous license file. Since the encryption codes do not match you will receive the above error message.
Resolution: Delete any FLUENT license on the client machine and set the LM_LICENSE_FILE variable to be able to access the license server.
2. The system clock has been set back on the client machine.
Resolution: Search your systems for file or folders that are dated in the future and delete them if possible. If that is not possible, for example, Windows systems files have been affected, you can change the date of these files or folders to the current date.