Gnat.Server.error

You're seeing just the callback error, go back to Gnat.Server module for more information.

Specs

error(message :: Gnat.message(), error :: term()) :: :ok | {:reply, iodata()}

Called when an error occured during the request/1

If your request/1 function returned {:error, term}, then the term you returned will be passed as the second argument. If an exception was raised during your request/1 function, then the exception will be passed as the second argument. If your request/1 function returned something other than the supported return types, then its return value will be passed as the second argument.