Docs: Add info about frontend install error response

diff --git a/docs/API/admin_api.md b/docs/API/admin_api.md
index 4c72d3d616e2c5dc9f4683227d5e948c794b5d23..19ac6a65f51e0dc49f08f87246f0a0a77bf50885 100644 (file)
--- a/docs/API/admin_api.md
+++ b/docs/API/admin_api.md
@@ -1556,3 +1556,9 @@ Returns the content of the document
   }
 ]
 ```
+
+```json
+{
+  "error": "Could not install frontend"
+}
+```