Hi Ravi,
I think it was caused by a mis-matched set of tags (this is a while ago now!)
It's definitely an issue caused by the front-end / HTML code, which then manifests as this exact error from the AngularJS side of things. Check your tags are cleanly nested and matched. I think I had a fouled-up Ionic list structure that was actually causing it for me, though Ionic lists generally seem fairly robust.
Try rebuilding the HTML structure you narrow the error down to, or get some fresh eyes to look over for glaringly obvious but invisible structural mistakes!
Hope that helps!
Dave