[Plugin: Widgets Reloaded] "Tags" Warning Message

I just updated to the latest “reloaded” version, and am now getting

Warning: join() [function.join]: Invalid arguments passed in /home/content/61/6527161/html/wp/wp-content/plugins/widgets-reloaded/widget-tags.php on line 55

Above my “Tags” widget. I’ve moved the widget to different places, gone from “hide on checked” to “show on checked”, removed the tag widget and reapplied, removed the title “Tags” and switched formating from “flat” to “List”…nothing I’ve done has corrected this. Bug or operator? Thanks in advance.

https://www.ads-software.com/extend/plugins/widgets-reloaded/