Error in IE 11

HI Guys

When I run in IE, I get an error. The default doc mode is IE7. I had to set IE9 to get it to work

<!-- Use Internet Explorer 9 Standards mode --> <meta http-equiv="x-ua-compatible" content="IE=9">
Should it work in IE7 mode?

Error attached



the component should work in IE7, and online demos seems working as well … lines.html

Probably there is something wrong with loading of sections to the timeline, the error occurs when the component tries to access section object.
Please provide some kind of demo, so we could reproduce the problem