UBB.threads PHP Forum Software Community Forums UBB.threads 6 Version 6 Bug Reports 7.6.0: "Reply" button doesn't work

Hello, I recently upgraded to 7.6.0. A user reported that the "Reply" button doesn't work. Clicking on it doesn't do anything. The URL is https://wordsmith.org/board/ubbthreads.php?ubb=showflat&Number=226749#Post226749 and here's a screenshot. Thanks.
[img]https://www.flickr.com/photos/101711891@N06/32644799273/[/img]