The following information is from the rTorrentWeb website:

rTorrentWeb is a Web GUI (Graphical User Interface) for the high-performance rTorrent torrent client. It is open-source (licensed under the GNU GPL version 3), and is written in the PHP programming language. This site is currently under construction, but a beta version of rTorrentWeb is available. This is the first public release, so there will be bugs and problems. Feel free to create a ticket if you encounter a bug.

Screenshot

If you think you have found a bug, please create a GitHub issue for it