diff --git a/setup/wizardsteps.class.inc.php b/setup/wizardsteps.class.inc.php
index 68566603b..51eb1b89a 100644
--- a/setup/wizardsteps.class.inc.php
+++ b/setup/wizardsteps.class.inc.php
@@ -2478,7 +2478,11 @@ class WizStepDone extends WizardStep
 		$oPage->add('</tr></table>');
 		
 		$oConfig = new Config(utils::GetConfigFilePath());
-		require_once(APPROOT.'env-production/core/main.php'); // For ModuleXMLParameters
+		// Load the data model only, in order to load env-production/core/main.php to get the XML parameters (needed by GetModuleSettings below)
+		// But main.php may also contain classes (defined without any module), and thus requiring the full data model
+		// to be loaded to prevent "class not found" errors...
+		$oProductionEnv = new RunTimeEnvironment($sTargetEnvironment);
+		$oProductionEnv->InitDataModel($oConfig, true);
 		$sIframeUrl = $oConfig->GetModuleSetting('itop-hub-connector', 'setup_url', '');
 		
 		if ($sIframeUrl != '')