diff --git a/src/Core/Addon.php b/src/Core/Addon.php
index ef2289ca5..8d1a86691 100644
--- a/src/Core/Addon.php
+++ b/src/Core/Addon.php
@@ -51,7 +51,7 @@ class Addon
 	 * @return array
 	 * @throws \Exception
 	 */
-	public static function getAvailableList()
+	public static function getAvailableList(): array
 	{
 		$addons = [];
 		$files = glob('addon/*/');
@@ -81,10 +81,11 @@ class Addon
 	 * @return array
 	 * @throws \Exception
 	 */
-	public static function getAdminList()
+	public static function getAdminList(): array
 	{
 		$addons_admin = [];
-		$addons = DI::config()->get('addons');
+		$addons = DI::config()->get('addons') ?? [];
+
 		ksort($addons);
 		foreach ($addons as $name => $data) {
 			if (empty($data['admin'])) {
@@ -186,10 +187,12 @@ class Addon
 	 * reload all updated addons
 	 *
 	 * @return void
+	 * @throws \Exception
+	 *
 	 */
 	public static function reload()
 	{
-		$addons = DI::config()->get('addons');
+		$addons = DI::config()->get('addons') ?? [];
 
 		foreach ($addons as $name => $data) {
 			$addonname = Strings::sanitizeFilePathItem(trim($name));
@@ -312,7 +315,8 @@ class Addon
 	public static function getVisibleList(): array
 	{
 		$visible_addons = [];
-		$addons = DI::config()->get('addons');
+		$addons = DI::config()->get('addons') ?? [];
+
 		foreach ($addons as $name => $data) {
 			$visible_addons[] = $name;
 		}