diff --git a/koha-tmpl/intranet-tmpl/prog/js/fetch/http-client.js b/koha-tmpl/intranet-tmpl/prog/js/fetch/http-client.js
index 2d6c771598..a1c91b7c89 100644
--- a/koha-tmpl/intranet-tmpl/prog/js/fetch/http-client.js
+++ b/koha-tmpl/intranet-tmpl/prog/js/fetch/http-client.js
@@ -80,7 +80,8 @@ class HttpClient {
                             let json = JSON.parse(text);
                             message =
                                 json.error ||
-                                json.errors.map(e => e.message).join("\n") ||
+                                json.errors?.map(e => e.message).join("\n") ||
+                                json.message ||
                                 json;
                         } else {
                             message = response.statusText;