app/setup/setups/logs.php

@@ -88,7 +88,9 @@ return [
                 $handler,
             ];
             if (is_array($handlerData['levels'])) {
-                $params += $handlerData['levels'];
+                foreach ($handlerData['levels'] as $level) {
+                    $params []= $level;
+                }
             } else {
                 $params []= $handlerData['levels'];
                 $params []= Monolog\Level::Emergency;