Connection Errors
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      1. Ably FAQs
      2. Ably error codes
      3. Connection Errors

      Error code: 40311 - operation requires tls connection

      When you create an Ably app, the default setting requires TLS for connections.

      This error occurs if you use a realtime SDK to connect to an Ably app with this default setting. It happens when you explicitly set tls client option to false while using token authentication.

      NOTE: You will see a 40103 error instead if you use an API key for authentication