Cannot read property 'call' of undefined


I'm encountering this error and observing the Stack Trace, there is an issue on the Widgets?:

TypeError: Cannot read property 'call' of undefined
    at t.ifWidget (
    at View.internalRender (
    at View.t.render (
    at View.t.render (
    at c._renderValidatedComponentWithoutOwnerOrContext (
    at c._renderValidatedComponent (
    at c._updateRenderedComponent (
    at c._performComponentUpdate (
    at c.updateComponent (
    at c.receiveComponent (

How are we able to resolve this?

Hi Geraldine,

Can you share the oml?