Since 2 days I'm having this trouble with that error in any views that I don't understand and can't find where it is this error:
Uncaught rerender threw an error in 'markup://aura:if' [Cannot read property 'childNodes' of null]
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This post solved my problem : Lightning: Bug in Lightning framework when using aura:renderIf? Try using a span around your element inside the aura:if
Or you could check this one: Error "error in 'markup://aura:iteration' : Cannot read property 'childNodes' of null" reported when a component is nested inside aura:iteration. Check the resources that you're including in your component and page [if any]. Maybe you're including SLDS twice.
If the above do not work, please post code snippet so we can help.