JSONRPC::requestMethod (455) request not dispatchable!

> Odd thing is only 1 of the MAC addresses seems to match a listed player
> (I have 10 listed).

That's exactly why you see these in the log: some client (web UI,
smartphone app etc.) is requesting data for players which are not connected.

> Anyway ... is it worth trying to hunt down the cause of this or, if not,
> could that error message be moved to the Warn category so that it will
> disappear from logs that are set to Error (assuming it is
> "(network.jsonrpc) - JSON-RPC API Logging")?

I would try to figure out where those requests come from. Eg. by
enabling exactly that logging category.

--

Michael