Many issues after updating to v2.0

Hello, after updating to v 2.0, there are several significant issues that I cannot seem to fix.

a) the slider on the home-page no longer works. I have deleted the old shortcode for [slider] and have made a new slider via the new options. Once I try to change the slider options on the home page to either “full width” or “boxed” , the options do not change but stay “disabled.”

Also, I can no longer change the layout of ANY pages on my website. It just stays full-width, even after I save the page after having changed the layout to include a sidepanel on either left or right side.

I’ve been trying different options for the past week. I’ve looked through the forum because I saw people had similar problems but the solutions posted on their forums do not work for me. Please help!!