Q & A Plugin Error Message in Browser Tab

Using Divi Theme with the Q & A Plugin.

I'm getting this error message in my browser tab :

<title>
<b>Warning</b>: Missing argument 2 for QA_Core::wp_title() in <b>/home3/swdelong/public_html/blog.flavorpantry.com/wp/wp-content/plugins/qa/core/core.php</b> on line <b>607</b>

<b>Warning</b>: Missing argument 3 for QA_Core::wp_title() in <b>/home3/swdelong/public_html/blog.flavorpantry.com/wp/wp-content/plugins/qa/core/core.php</b> on line <b>607</b>
Questions Archive - FlavorPantry</title>

Any ideas what this is and why it's in the Browser Tab where the page title should appear?

Thanks,

Steve