Notice: Undefined variable showing when I enable Wordpress debugging

Hi guys,

I had some trouble with my Wordpress install after moving server so I enabled Wordpres debugging.

I've fixed everything now except I'm getting this error when I install Protected Content.

"Notice: Undefined variable: scheme in /home/thelifekey/public_html/wp-content/plugins/protected-content/app/model/class-ms-model-member.php on line 548"

Is it anything to worry about or should I just ignore it?

Thanks

Steve