Error while trying to render Entity Form on Web Template

Hello all!

I'm trying to set entity form on the custom page using Web Template. But in the result i have an error like this

An unknown error has occurred. Error detection [86aee7ff-28c0-4870-ac93-fa8a372f3045]

{% entityform name: 'Portal comment' %}

This form has "Insert" mode.

I tried to render other forms with this code but no success.

Any ideas ? 

Thanks in advance!