I'm currently in a very early state of the shop integration and it's the first time I'm working with foxycart, so maybe I'm doing something completely wrong. Please advise me if that's the case.
When trying to process a test payment through Paypal Express checkout I get the following error:
There was an error processing your payment: (10401 Transaction refused because of an invalid argument. See additional error messages for details.) Order total is invalid.
I can't find any specific faults in the error log that could have caused the problem.
I use german Paypal standard sandbox accounts for processing.
If you need some further informations about my setup, pleas let me know.
Thanx for your help,