If you change “$” to “jQuery” in lines 6 & 15 of “/wp-security-scan/js/scripts.js” it removes that problem, but then you run into a different javascript error that I haven’t been able to fix yet (I’m still unexperienced with javascript debugging).
Hopefully this is helpful to finding a fix. I’ve also contacted the plugin creator about this issue, and I’ll give an update here when I get a response back.