Notice: undefined variable scheme after updating Protected Content

I am working on a custom plugin so I am developing with wp_debug active on a development server. I see a notice generated by the latest version of Protected Content that comes up at the top of every admin page. Below is an example of the Notice:

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

When the notices are up there from Protected Content if any other code throws an error WordPress locks up with a Warning: headers already sent.