diff --git a/gml_application_schema_toolbox/gui/load_wizard_wfs.py b/gml_application_schema_toolbox/gui/load_wizard_wfs.py
index 95690a5..6d852d5 100644
--- a/gml_application_schema_toolbox/gui/load_wizard_wfs.py
+++ b/gml_application_schema_toolbox/gui/load_wizard_wfs.py
@@ -7,6 +7,7 @@
 # Standard library
 import os
 
+from lxml.etree import XMLSyntaxError
 from owslib.util import ServiceException
 from owslib.wfs import WebFeatureService
 from qgis.core import (
@@ -210,6 +211,10 @@ def on_connectBtn_clicked_(self):
             self.datasetsTabWidget.setTabEnabled(
                 self.datasetsTabWidget.indexOf(self.tab_2), False
             )
+        except XMLSyntaxError:
+            self.datasetsTabWidget.setTabEnabled(
+                self.datasetsTabWidget.indexOf(self.tab_2), False
+            )
 
         self.storedQueriesListWidget.sortItems()