My app use IE to login to Dropbox with Auth2. But all the buttons in the Auth page are disabled. And i can see an JS error in the Console if IE 11.
SCRIPT438: Object doesn't support property or method 'assign'
alameda_bundle.min-vflHAZfb_.js (1,21865)
It seems that the JS error make the script not run in IE and the buttons are not enabled.
Please help to solve this problem, thanks.

