Template Page Interactions & Custom Code Not Working

This has been a very odd morning. Yesterday, everything was working on my template CMS page. Today… even if I try something as simple as adding a new div block (fixed, 100% width/height, z-position 11, BG: black ) it won’t show. I can’t imagine what I’m doing wrong…

What more strange is that interactions are working on other pages. I really have no idea where to start with this one. Here’s a video

Here’s my Read Only Link: