XF 2.1 cannot remove a payment method

[hellboy78]

ErrorException: [E_WARNING] array_merge(): Expected parameter 2 to be an array, object given in src/XF/Admin/Controller/PaymentProfile.php at line 152

1. XF::handlePhpError()
2. array_merge() in src/XF/Admin/Controller/PaymentProfile.php at line 152
3. XF\Admin\Controller\PaymentProfile->actionDelete() in src/XF/Mvc/Dispatcher.php at line 321
4. XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 244
5. XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 100
6. XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 50
7. XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2177
8. XF\App->run() in src/XF.php at line 390
9. XF::runApp() in admin.php at line 13