diff --git a/html/src/app.js b/html/src/app.js
index 9494cdc7..1cc4d305 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -399,6 +399,9 @@ speechSynthesis.getVoices();
                 }
                 throw new Error('401: Missing Credentials');
             }
+            if ((status === 503) && (data.error.message === 'endpoint temporarily disabled')) {
+                throw new Error('503: Endpoint temporarily disabled');
+            }
             if (data.error === Object(data.error)) {
                 this.$throw(
                     data.error.status_code || status,