diff --git a/src/api/EteSync.ts b/src/api/EteSync.ts
index a05cc89..45fd0e6 100644
--- a/src/api/EteSync.ts
+++ b/src/api/EteSync.ts
@@ -338,7 +338,7 @@ class BaseNetwork {
           if (response.ok) {
             resolve(body);
           } else {
-            reject(new HTTPError(json.detail));
+            reject(new HTTPError(json.detail || json.non_field_errors));
           }
         }).catch((error) => {
           reject(error);