[Plugin: Skitter Slideshow] Invalid Header

The newest version of wordpress is registering an invalid header for this plugin and is disabling it in the menu. it’s weird because i’ve been using this plugin for a while and it’s never given me a problem until the last few weeks. i don’t think it’s a conflict or anything because i’ve tried it in two different places and it gets the same error, but only after i return to the plugin menu after enabling it. i’ve tried messing around with some solutions from other forums (loading it from within wordpress, taking the spaces out of the head, looking for nested folders, etc) with no luck. any idea what’s causing the problem? i’d owe you one.

https://www.ads-software.com/extend/plugins/wp-skitter-slideshow/