explode(): Passing null to parameter #2 ($string) of type string is d…

…eprecated

bundles/CoreBundle/Helper/MaxMindDoNotSellDownloadHelper.php

@@ -36,7 +36,7 @@ class MaxMindDoNotSellDownloadHelper
     public function __construct($auth, LoggerInterface $logger, HttpClientInterface $httpClient, CoreParametersHelper $coreParametersHelper)
     {
         $this->logger     = $logger;
-        $this->auth       = explode(':', $auth, 2);
+        $this->auth       = explode(':', (string) $auth, 2);
         $this->httpClient = $httpClient;
         $this->listPath   = $coreParametersHelper->get('maxmind_do_not_sell_list_path') ?? '';
     }