If you are seeing this error: Error: Body_HTML: is too big (maximum is 64kb).
What's Causing The Error: Body_HTML: is Too Big Error?
Unfortunately Shogun has no control over this and the best I can advise is to try splitting up the page or reducing it in size.
Check your page for redundant or unnecessary elements (i.e. boxes, 2 text elements when you could use 1), or large Custom Elements that you've built.