grecaptcha is not defined

[NaqashPixy]

on verify() feting this error with polymer 2.0 :(

invisible-recaptcha.html:130 Uncaught ReferenceError: grecaptcha is not defined
at HTMLElement.verify (invisible-recaptcha.html:130)
at HTMLElement._submit (pf-contactus.html:147)
at HTMLElement.handler (template-stamp.html:92)
at Object._fire (gestures.html:535)
at Object.forward (gestures.html:830)
at Object.touchend (gestures.html:819)
at HTMLElement._handleNative (gestures.html:333)


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