HMTL Embedding Not Working

#1

Hi! I’m working on a chatbot, and am at the point where I’d like to test it on my website by using the HMTL embed feature. My website is on Weebly, and the bot looks fine before publishing, but when I publish it and go on the website, it is as small as the HTML box on Weebly. I can’t figure out a way to make the Weebly box bigger or get the bot to stay. First screenshot is on Weebly Editor.

#2

This screenshot is how it looks when the website is published. When I type, it stays the tiny little box.