An invalid license error can mean two things. The meaning of each and how to "fix" them will be covered below:
You are a new user and this is a fresh installation; OR
You are trying to activate HaasOnline Trade Server (HTS) on a second machine
For new users with fresh installation, simply complete your First Time Setup process and you will not have this error the next time you start up your HTS again.
You can read about completing your installation here:
For users whom are trying to activate HTS on a second machine, you must understand that HTS is an application that is meant to be ran on a single machine at any point in time. If for whatever reason you need to migrate your installation to another machine, please follow this guide:
Be sure to completely shut down HTS and uninstall and remove all related files from your original machine after you have successfully completed your migration.
If you continue to receive the above error after activating your license on the second machine, please contact Support.