Report on customers and open amounts

Is there a way I can make a report on the name of the customer and the invoices he/she still have to pay.

Yes, go to Reports tab, then Customer Statements (you might need to enable Customer Statements by clicking Customize button)

On 14.5.2 I do not have a customer statement report on Reports and under Reports > Customize.

Then upgrade to the latest version.

Thanks, solved