Add checks for other common statuses

src/services/api/api.service.js

@@ -467,6 +467,10 @@ const errorStatusMapper = (response) => {
   switch (response.status) {
     case 429:
       return 'You are rate limited'
+    case 500:
+      return 'Internal Server Error'
+    case 503:
+      return 'The backend is not available'
     default:
       return `Unexpected status: ${response.status}`
   }