---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/52111#article
headline: "52111: GCM/FCM unknown error"
url: https://www.twilio.com/docs/api/errors/52111
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 52111: GCM/FCM unknown error

Log Level: ERROR

## Description

### Possible causes

* Unknown GCM/FCM error.

### Possible solutions

* If the problem persists, contact [customer support](https://www.twilio.com/help/contact) and provide the time of the error and details about the requests that are failing.