My web doesn't appear after change DNS to Cloudflare

My web doesn’t appear after I change DNS to Cloudflare. I use other domain providers to Cloudflare to having SSL. My web uses GitHub hosting to put the data.
My settings in DNS Cloudflare.
My web doesn’t appear.

Please help me. Thank you.

My domain web is

It’s certainly blank. Was your site working with HTTPS before you added it to Cloudflare?

My site was working before added it to Cloudflare in

Can you explained what can I do for fix it?

For now, use the Overview page for your domain to Pause Cloudflare on Site and then wait five minutes for it to take effect. Then your domain will be in DNS Only mode so you can fix your settings to get Github to work with your domain and HTTPS.

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