How does the page look?Does it fully load but the steps do not start highlighting or does not render the page at all?Also are you in a .Net or Java stack?
Then it looks like you are hitting the max size limit of the request. (Default is around 130MB)What is your OSP size?
See the installation checklist on how to increase them if that's the problem.
We are currently facing a similar issue in my company - How did you go with increasing the default size and publish the solution? Did that resolve the problem?
I would be very keen to know and I will appreciate if you can let me know.