Fatal error when activated with Event Espresso 4

Activating the current version of Pronamic Pay on a site that has Event Espresso 4 will result in a fatal error. You can avoid the fatal error by changing the hook point in Pronamic_WP_Pay_Extensions_EventEspresso_Extension‘s constructor to AHEE__EE_System__load_espresso_addons instead of hooking to plugins_loaded priority 0.