diff --git a/assets/js/sync/index.js b/assets/js/sync/index.js
index 194bb2bb48..5f1aca710a 100644
--- a/assets/js/sync/index.js
+++ b/assets/js/sync/index.js
@@ -124,12 +124,19 @@ const App = () => {
 			}
 
 			/**
-			 * Log any messages.
+			 * Log any error messages created by the browser.
 			 */
 			if (error.message) {
 				logMessage(error.message, 'error');
 			}
 
+			/**
+			 * Log any error messages created by the back-end.
+			 */
+			if (error.data?.message) {
+				logMessage(error.data.message, 'error');
+			}
+
 			logMessage(__('Sync failed', 'elasticpress'), 'error');
 			updateState({ isSyncing: false });
 		},