Apologies for this! This is the only plugin I “maintain” (and don’t even really have a lot of time for that anymore), so I’m still a newbie at using svn, and managed to lose a file when updating to 1.1.2.
Here’s a link to a zip file of the whole plugin, which you can either use to replace the code entirely, or just extract the missing uwfWidgetControls.class.php file, which if you upload it into wp-action-network/includes should fix the problem.
https://www.dropbox.com/s/0y2ug73s06rkt2p/wp-action-network-1.1.2.zip?dl=0
Also fixed on here, but not sure if you can use the WP backend to update unless there’s a new version?