Customer complained of the inquiry widget crashing out on him this morning. Looks like if there's too much text (he wrote a book!) in the "Message to owner" field it craps out.
Yep, that was exactly the problem. Thanks for the bug report!
I added a 1024 character limit with a friendly error message to the guest that they need to shorten up the comments.
That hotfix is now deployed, so this shouldn't happen again.