The PayStack payment gateway is 100% incompatible with FOSSBilling version 0.5.0 and newer regardless of what theme you are using. The only reason it is functional for @Oluwatobi is because of a leftover Box\InjectionAwareInterface class on the disk from an older version of FOSSBilling / BoxBilling.
It can be used on a newer version of FOSSBilling by manually creating InjectionAwareInterface.php under the /library/Box/ directory and placing the following contents in it:
namespace Box;
interface InjectionAwareInterface
{
/**
* @param \Box_Di $di
* @return void
*/
public function setDi($di);
/**
* @return \Box_Di
*/
public function getDi ();
}
This will work indefinitely, but the only proper fix is for the author of the payment gateway to update maybe 6 lines of code for it to genuinely be compatible.
