if not set, the plugin manager getter will return a default, empty plugin manager

Author: n3vrax

src/AbstractController.php

@@ -18,6 +18,7 @@
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Zend\EventManager\EventManagerAwareInterface;
+use Zend\ServiceManager\ServiceManager;
 
 /**
  * Class AbstractController
@@ -120,6 +121,9 @@ public function plugin(string $name, array $options = []): PluginInterface
      */
     public function getPluginManager(): PluginManager
     {
+        if (!$this->pluginManager) {
+            $this->pluginManager = new PluginManager(new ServiceManager(), []);
+        }
         return $this->pluginManager;
     }