When installing any of the Clever Apps into a Business Central Environment, some additional dependent Apps will also need to be installed which work in conjunction with the main App. 

When installing from Appsource into a SaaS Environment, the dependant Apps will be automatically installed for you.  However, for On-Premise Environments, they will need to be manually installed.  More information on this can be found here Clever App - Installing Apps into On-Premise Environments

The below Matrix shows the dependant Apps for each of our Clever Apps.