diff --git a/lib/API/JSON/API.php b/lib/API/JSON/API.php
index 1bbf4ceb09..6d7d056a2c 100644
--- a/lib/API/JSON/API.php
+++ b/lib/API/JSON/API.php
@@ -190,7 +190,11 @@ class API {
         throw new \Exception(__('HTTP request method not allowed.', 'mailpoet'));
       }
 
-      if (class_exists(Debugger::class)) {
+      if (
+        class_exists(Debugger::class)
+        && class_exists(DIPanel::class)
+        && class_exists(ApiPanel::class)
+      ) {
         ApiPanel::init($endpoint, $this->requestMethod, $this->requestData);
         DIPanel::init();
       }
diff --git a/lib/AdminPages/PageRenderer.php b/lib/AdminPages/PageRenderer.php
index 8278a47727..2bf886e1a6 100644
--- a/lib/AdminPages/PageRenderer.php
+++ b/lib/AdminPages/PageRenderer.php
@@ -64,7 +64,10 @@ class PageRenderer {
       'wp_segment_state' => $wpSegmentState,
     ];
     try {
-      if (class_exists(Debugger::class)) {
+      if (
+        class_exists(Debugger::class)
+        && class_exists(DIPanel::class)
+      ) {
         DIPanel::init();
       }
       echo $this->renderer->render($template, $data + $defaults);
diff --git a/lib/Doctrine/EntityManagerFactory.php b/lib/Doctrine/EntityManagerFactory.php
index 23ba3b5abb..377d9ce8c6 100644
--- a/lib/Doctrine/EntityManagerFactory.php
+++ b/lib/Doctrine/EntityManagerFactory.php
@@ -6,6 +6,8 @@ use MailPoet\Doctrine\EventListeners\EmojiEncodingListener;
 use MailPoet\Doctrine\EventListeners\LastSubscribedAtListener;
 use MailPoet\Doctrine\EventListeners\TimestampListener;
 use MailPoet\Doctrine\EventListeners\ValidationListener;
+use MailPoet\Tracy\ApiPanel\ApiPanel;
+use MailPoet\Tracy\DIPanel\DIPanel;
 use MailPoet\Tracy\DoctrinePanel\DoctrinePanel;
 use MailPoetVendor\Doctrine\DBAL\Connection;
 use MailPoetVendor\Doctrine\ORM\Configuration;
@@ -49,10 +51,13 @@ class EntityManagerFactory {
     $this->lastSubscribedAtListener = $lastSubscribedAtListener;
   }
 
-  public function createEntityManager() {
+  public function createEntityManager(): EntityManager {
     $entityManager = EntityManager::create($this->connection, $this->configuration);
     $this->setupListeners($entityManager);
-    if (class_exists(Debugger::class)) {
+    if (
+      class_exists(Debugger::class)
+      && class_exists(DoctrinePanel::class)
+    ) {
       DoctrinePanel::init($entityManager);
     }
     return $entityManager;