Non-Skuid Users "Insufficient Privileges"

the Non-Skuid Users in our environment are getting “Insufficient Privileges” when they try to open standard detail page for record.

Hi Sandeep,

Make sure that your users have access to the Visualforce override pages that you are using to override the Detail Page — go to Setup > Pages, find your page, and click “Security” next to it, then ensure that your users’ profiles have access to these VF pages.

see this post for  more info regarding this

hope it helps