If you are receiving an error message saying you need a ChargentP2 license it means your Chargent Anywhere license either isn't active or hasn't been assigned correctly. If you are already a customer you want to uninstall the Chargent P2 package and install our new Chargent Anywhere v1.25 package. Chargent Anywhere v1.25 has been updated to include a ton of improvements to help manage your payment processing in Salesforce.
Chargent Installation Page
Install Instructions for Chargent Anywhere v1.25