Undefined index: scheme error coming from GP Premium

Hello,

I’m getting an “Undefined index: scheme error message” on the mobile version of my site. According to query monitor it’s coming from GP Premium plugin. I’ve deactivated all plugins and it goes away, and comes back when activating GP Premium only.

Could it be possible that it’s because I’m on a staging site right now? My logo is hosted in my main image folder for the live site, but the URL it links to right now is the staging site.

The code causing the problem appears to be:

if ( isset( $image_path['scheme'] ) && ( $image_path['scheme'] !== $site_url['scheme'] ) ) {
		$path = str_replace( $image_path['scheme'], $site_url['scheme'], $path );
	}

I'm providing private login info below to view staging site.

Thanks!
Becki