Copying page results in white page

I often copy entire code of a page to another page when i only need to make a few changes on second page. This always works great but now when i tried to copy a page , even with the exact same code it is rendering very different. These pages are in the same project . The original is the homepage. The copy is in a folder in the same project. What could be the cause of this ? I tried deleting the folder and remaking it too

Original Page

Copy