wp_register_style/wp_enqueue_style called incorrectly

Hi Donna, I was recently trying to fix a problem but saw that debug mode was spitting out this problem (screenshot).

It was actually when I was trying to deactivate all my plugins that I discovered that maybe it had something to do with Book Reviews? I turned it off and the debug notice went away immediately.

I can’t write PHP to survive so I didn’t want to anything to destroy your plugin. I just wanted to know if you’ve encountered this as well and if there was a fix to it?

https://www.ads-software.com/plugins/book-review/