### What?
When a script attempts to load payload using `getPayload()`, it will end
with: `Error: connect ECONNREFUSED 127.0.0.1:3000` etc...
### Why?
Even though there is a try/catch, it still errors because WebSocket
connection failures happen asynchronously after the ws object is
instantiated.
### How?
Added the error handling function cached.ws.onerror to prevent exit.
488c28c99c