diff --git a/umap/static/umap/js/umap.xhr.js b/umap/static/umap/js/umap.xhr.js
index fc6d1990..4855137d 100644
--- a/umap/static/umap/js/umap.xhr.js
+++ b/umap/static/umap/js/umap.xhr.js
@@ -95,7 +95,7 @@ L.U.Xhr = L.Evented.extend({
             // 0 === request cut by user or CORS
             self.ui.alert({
               content: L._(
-                'Issue reaching that URL (network problem or CORS protection)'
+                'Issue reaching that URL (network problem or CORS protection)' + ` ${settings.uri}`
               ),
               level: 'error',
             })