I have Enrollment on Payment (through PayPal) working flawlessly, except for one things: when users click the "Select Payment Type" button and the enroll.html popup opens, it has the following string under the PayPal payment button:
{$a->label}: {$a->value}
I have searched high and low for any information and have only been able to verify that my integration follows all the instructions. The payments are processed; users receive no error, but that line of code is worrying everyone.