KbArticle SystemVIew in Iframe of web resource

Hello.

I'm trying to use KbArticle system views (/main.aspx?etn=kbarticle&pagetype=entitylist&viewid=%7b63955B3B-F96D-DF11-986C-00155D2E3002%7d&viewtype=1039) in a iframe of custom web resource html page. It works fine, i can sort, filter and select results, choose view, even diagrams.

But there is an exception, when i'm trying to filter by Subject. It happens on "Choose" buton of SubjectTree.

ConsoleLog:

1. Refused to set unsafe header "Content-Length" global.ashx?ver=-751557810:7
   1. executeglobal.ashx?ver=-751557810:7
   2. Mscrm.Tree.$9_3tree.js?ver=-751557810:1
   3. Mscrm.Tree.$M_3tree.js?ver=-751557810:1
   4. (anonymous function)global.ashx?ver=-751557810:5
   5. bglobal.ashx?ver=-751557810:5

Looks like "Content-length" exception is not a reason of fault. This form keep working with same exceptions when it opened  in self window.
CRM 2013. Chrome and any other modern browsers. How can i fix this alert?