SharePoint site and list “stop Inheriting permission” button is inactive

Question

I am using SharePoint 2013 and when I am going to set unique permission for sites and pages with SharePoint designer, every thing is working fine.

But when I am going to set unique permission for lists and libraries with manage list permissions in list setting, "stop Inheriting permission" button is inactive and there is no check box per group.

Note: I am using site collection administrator to this work

Answer 1

If you are a site collection admin and "Stop Inheriting Permissions" is disabled then its not a SharePoint permission issue. It could be

1. A web browser issue. Try different browser.
2. Try deleting the web browser cache/temporary internet files/cookies.
3. Try on a different machine with your login.