When I go into a topic and select Open the Forum Toolset then Reverse Sort this forum it doesn't seem to respond. In Chrome if I open the console window I see:
jquery.js?ver=1.12.4-wp:4 GET https://<my site>/wp-admin/admin-ajax.php?action=spForumTools&targetaction=sort-forum&forumid=7&_wpnonce=c8ed83ad03 500
I seem to have gotten it to work since one of my forums is now sorting backwards but it's the wrong one and I can't change it back 🙁
We've verified that this is an issue in 6.4.0 and have pushed a fix to github. The fix will be in the next release (6.5) but I don't have a release date yet.
If you're comfortable editing code files, you can find the changes here: https://github.com/Simple-Pres.....6da2c42494.
I'm not quite sure how you got anything to reverse sort - that's a bit concerning because it could mean that the sort flag is no longer in the format we expect. Hopefully though, applying the changes should resolve the issue for you assuming the existing sort flag isn't corrupted somehow. They're pretty simple - just three lines to be added to two functions.