Why can I not add anymore images into assets?

https://preview.webflow.com/preview/montclair-general-plan?preview=d7fe8d6be2073cd7cd38cef79313f49b
I am a new user trying out the VERSUS template on trial membership. I replaced and added a few assets. I cannot add or replace anymore images. Am I running up against the limits of a trial membership. Please help.