node-red-node-email, send node "ReferenceError: msg is not defined" on deploy

excellent write up in this thread;

https://discourse.nodered.org/t/node-red-emailer-and-0auth2-referenceerror-msg-is-not-defined-function-check/86178/2

Intro- the node red email node when selecting the XOauth2 setting in the interface is giving the error "ReferenceError: msg is not defined when deployed.

Which node are you reporting an issue on?

node-red-node-email, send node

What are the steps to reproduce?

set the send node to use XOuth2 authentication and deploy the flow

What happens?

on deploy the "ReferenceError: msg is not defined" is displayed in the debug panel,

What do you expect to happen?

no error on deploy.

Please tell us about your environment:

• [ 3.1.3] Node-RED version:
• [v16.20.2 ] node.js version:
• [ 8.19.4] npm version:
• [ docker container, Ubuntu 22.04.4 LTS (server) ] Platform/OS:
• [mozilla ] Browser:

docker run command

docker run -it -p 1880:1880 -p 8080:8080 -v node_red_data:/data --network="host" --name mynodered nodered/node-red

Start with the node-red-node-email send node and reproduce the issue by selecting XOauth2 authentication and deploying the flow in the reported environment. Trace the deploy path that produces “ReferenceError: msg is not defined”; done means deployment completes without that error and the email node remains usable.