Meta content gap:// for ios in index.html is causing a white space in the footer of my app

If I include the below meta in my index.html, I’m getting a white space in the footer of my IOS app.

<meta http-equiv="Content-Security-Policy" content="default-src * gap:// ; script-src 'self' 'unsafe-inline' 'unsafe-eval' *; style-src  'self' 'unsafe-inline' *">

If I remove the gap:// that white space disappears but my in-app browser like Facebook login are not opening. Not sure whether the gap:// is conflicting with some style, please advice me.

Thanks.

Problem solved, turns out we have written code to include admob which we are not using any more. We forgot to comment that away, once we cleared the admob related code, the white space was gone.