diff --git a/public/i18n/locale-en.json b/public/i18n/locale-en.json
index 074cce2..eba9e48 100644
--- a/public/i18n/locale-en.json
+++ b/public/i18n/locale-en.json
@@ -1,5 +1,7 @@
 {
   "ERRORS": {
+    "unknown_error": "Unknown error, contact the admin.",
+    "unreachable": "Anonymous GitHub is unreachable, contact the admin.",
     "request_error": "Unable to download the file, check your connection or contact the admin.",
     "repo_not_found": "The repository is not found.",
     "repo_not_accessible": "Anonymous GitHub is unable to or is forbidden to access the repository.",
diff --git a/public/script/app.js b/public/script/app.js
index 3c13ce0..2206e5a 100644
--- a/public/script/app.js
+++ b/public/script/app.js
@@ -1667,6 +1667,7 @@ angular
             },
             (err) => {
               $scope.type = "error";
+              $scope.content = "unknown_error";
               try {
                 err.data = JSON.parse(err.data);
                 if (err.data.error) {
@@ -1678,6 +1679,9 @@ angular
                 console.log(err);
                 if (err.status == -1) {
                   $scope.content = "request_error";
+                } else if (err.status == 502) {
+                  // cloudflare error
+                  $scope.content = "unreachable";
                 }
               }
             }