TypeError: Scheduler.onMarketOpen is not a function

[skagraw2]

Hi,
I am getting following error while using given example in the package. Please help how to fix it.

using node v12.13.0.

c:\test\node examples\highest-open-interest.js
C:\test\node_modules\algotrader2\examples\highest-open-interest.js:28
Scheduler.onMarketOpen(5 * 60000, open).catch(error => console.error(error)); // Run every day on market open
^

TypeError: Scheduler.onMarketOpen is not a function
at Object. (C:\test\node_modules\algotrader2\examples\highest-open-interest.js:28:11)
at Module._compile (internal/modules/cjs/loader.js:956:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
at Module.load (internal/modules/cjs/loader.js:812:32)
at Function.Module._load (internal/modules/cjs/loader.js:724:14)
at Function.Module.runMain (internal/modules/cjs/loader.js:1025:10)
at internal/main/run_main_module.js:17:11