Where do I find it?
Configuration > Business Data > Payment Accounts
What does it mean?
Payment accounts defines the general payment methods you accept. As default method it will always just show cash, but you are able to delete it. Credit card is necessary in case you use the Palisis payment terminals but also if you have an own credit card solution. Vouchers are necessary in case you use the partnering system.
What should I do?
Select which payment methods you accept in your business. Simply drag and drop them to the right side in order to activate them. Don't forget to save!