Failed to send to backend (Search failed)

Hy, when i search, i get this error:

``` javascript
{ [Error: Failed to send to backend (Search failed)]
  domain: 9,
  code: 1,
  description: 'Search failed',
  data: null,
  name: undefined,
  message: 'Failed to send to backend (Search failed)' }
```

Knows somebody why i got this?
