This can sometimes occur when using a Rent-to-Own license from Plugin Boutique with an expansion purchased through Lunacy.
If you activated BEAM through Beatport Access, you must also link your Lunacy account to sync your licenses.
First, navigate to the Settings modal by clicking the gear icon in the upper right corner of BEAM.
Click on the Account tab, enter your Lunacy username and password, and click “Link with Lunacy Account” to begin syncing your license keys.