api, missing check for existing method.

src/opnsense/mvc/app/controllers/OPNsense/Base/ApiControllerBase.php

@@ -132,6 +132,8 @@ class ApiControllerBase extends ControllerRoot
                                 $dispatchError = null;
                                 // check number of parameters using reflection
                                 $object_info = new \ReflectionObject($this);
+                                if ($object_info->hasMethod($callMethodName)) {
+                                    // only inspect parameters if object exists
                                     $req_c = $object_info->getMethod($callMethodName)->getNumberOfRequiredParameters();
                                     if ($req_c > count($dispatcher->getParams())) {
                                         $dispatchError = 'action ' . $dispatcher->getActionName() .
@@ -151,6 +153,7 @@ class ApiControllerBase extends ControllerRoot
                                         $this->response->send();
                                         return false;
                                     }
+                                }
 
                                 return true;
                             }