Need help on CSR list forms

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SharePoint2013

Hi,

Good Day!
I have created a SharePoint list forms form scratch using CSR.

this is the link that i have followed.

Everything is working as expected without attachment.

But when i select attach file option from the ribbon and click on OK button, I am getting Cannot read property 'insertRow' of null at OkAttach error in console.

Can anybody please help me out with this. Or is there any other way that I can use to create attachment control/field on the form.

What I have tried:

this is the link that i have followed.