Community Help! Javascript issue

Hello everyone. I have a javascript issue that I'm hoping someone can help me with. (I'm very new to javascript.) I tried to create an interaction where users can email themselves their notes. It works fine when I test it using a couple of sentences. Unfortunately, when I try to type in a paragraph, I can't get it to generate an email. What's going on here? Is it something with Storyline? Is it our email client? Is it the Javascript?

If I need to, I can set a character limit. though it won't give them the opportunity to write very much. If there's no way to fix the email generation issue, I'd appreciate some direction on setting a character limit as well.

I've attached the Storyline file and the javascript.