ERROR TypeError: Cannot read property 'toDataURL' of undefined

[subratastack]

ERROR TypeError: Cannot read property 'toDataURL' of undefined
    at SignaturePadComponent.onSaveClick (signature-pad.component.js:67)
    at Object.eval [as handleEvent] (SignaturePadComponent.html:9)
    at handleEvent (core.js:13532)
    at callWithDebugContext (core.js:15041)
    at Object.debugHandleEvent [as handleEvent] (core.js:14628)
    at dispatchEvent (core.js:9944)
    at eval (core.js:10569)
    at HTMLButtonElement.eval (platform-browser.js:2628)
    at ZoneDelegate.invokeTask (zone.js:421)
    at Object.onInvokeTask (core.js:4724)

I'm getting this error when I click on Save, and also if I scribble on the canvas nothing happens.

[pedrofg]

Same here when deploying on production env. @subratawebops are you using AOT?