Seems there is a problem with this mod.
https://vborg.vbsupport.ru/showthread.php?t=82769
when displaying the member URLs, it only displays them as /members/-###.html and it doesn't display it like /members/username-###.html -- and because of this, it throws a 404 error due to the .htaccess not accepting it.
Any idea if this is a problem on your side or if it's a problem with the mod?