I have a VF page which I wrote, and put it within the Opportunity page layout.
This is working for a long time. Starting yesterday, I'm getting this error and the Opportunity page does not load.
URL No Longer Exists
When I remove the VF page everything is fine.
This is the URL I see on the page with the URL error, where 066b0000001ZhB5 is my custom vf page
Why is this suddenly happening? How do fix this?
Best Answer
It sounds like this is the new clickjacking protection in Winter 13. I think I read somewhere recently that this was defaulting on in all Orgs, but I can't recall where.
See VisualForce components in Page Layouts causing "URL No Longer Exists" error