issues upgrading Ember 1.8.1 to Ember 1.9.1 with Handlebars 2.0 and emblem

Im wondering if anyone came across this issue with upgrading Emberjs from 1.8.1 to 1.9.1

I am getting this error in my dev console

This link-to is in an inactive loading state because at least one of its parameters presently has a null/undefined value, or the provided route name is invalid.

Besides upgrading to Ember 1.9.1 and Handlebars 2.0 I am also using gulp-auto-emblem I have checked http://ift.tt/1vLFjFL and it seems like no support for Handlebars 2.0 yet..

I have found a solution to fix the link-to issue by doing this:

link-to 'report.index' report

but i need to have class names in my link-top helper

link-to 'report.index' report id class='button button--viewReport'

but this doesnt work..

any feedback would be appreciated.. thanks