Bug with Manual Payment

Warning: array_map(): Argument #2 should be an array in /wp-content/plugins/marketpress/marketpress-includes/plugins-gateway/manual-payments.php on line 231

Call Stack:
0.0011 860560 1. {main}() /wp-admin/edit.php:0
0.0017 987888 2. require_once('/wp-admin/admin.php') /wp-admin/edit.php:10
0.3337 54597832 3. do_action() /wp-admin/admin.php:151
0.3337 54600040 4. call_user_func_array() /wp-includes/plugin.php:403
0.3337 54600176 5. MarketPress->admin_page() /wp-includes/plugin.php:0
0.3348 54606488 6. apply_filters() /wp-content/plugins/marketpress/marketpress.php:6335
0.3348 54608552 7. call_user_func_array() /wp-includes/plugin.php:170
0.3348 54608688 8. MP_Gateway_ManualPayments->process_gateway_settings() /wp-includes/plugin.php:0
0.3348 54608992 9. array_map() /wp-content/plugins/marketpress/marketpress-includes/plugins-gateway/manual-payments.php:231