Screenshots of Temporarily Changing Remote Theme to Cayman

My code change:

The theme changes reflected in my website:

The Problems

After changing the theme of my blog from the default, minima, to Cayman, I noticed many changes. Firstly, the menu bar of my website went away and my pages on my menu disappeared. All of the links were gone. Next, a large area of my blog was taken up by a blue/green bar. The font also changed. Next, the box around each individual post went away and all of my posts were listed as bullet points.