Not working

{ timeout: 5, extra: [ '-w', '10' ] }
timers.js:479
throw new ERR_INVALID_CALLBACK();
^

TypeError [ERR_INVALID_CALLBACK]: Callback must be a function
at setInterval (timers.js:479:11)
at Object. (/home/twelixty/twelixty/mon.js:72:1)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

The error is with timers.js, my code is identical to your example in README.md
as I was testing to make sure it works before adding it to me project.

I am running Node v10.23.1
Timer.js version is v5.8.0