Facebook Policy Warning for Log-in App

Hi,

I've installed wpDiscuz (& a paid plugin) on my blog. I have created a FB login app accorind to your instructions. It's working fine, however I recieved an email from Facebook saying the log in button is against their policies etc. Is there a way I can fix it?

I paste the content of their email:

In working to create a great Platform experience for everyone, we ask developers to ensure the apps they build comply with our Platform Policies. Your app GoldenBloggerz comment login (App***********7Id: ) doesn't comply with the following:

Platform Policy 8.3: Use a clearly branded "Login with Facebook" button and follow the Facebook Brand Guidelines: https://www.facebookbrand.com/.

Your Login button doesn't properly reference Facebook. To fix this issue, you should always use our official SDK for Login. For more information on Login best practices, check out the Login section of our developer documents: https://developers.facebook.com/docs/facebook-login/best-practices#buttondesign.

You can access the full list of our Platform Policies here: https://developers.facebook.com/policy/.

Please make the requested changes by 2020-02-06 at 12:00 PST.

Let us know when you've updated your app by replying to this email. If we do not hear back from you, your app will be subject to enforcement. If you have outstanding questions, respond here and we'll do our best to help.