How Do I Fix Error 520

I have been experiencing this error for a little while. is there any solution so i can get my website back up and running?

What is your domain name?

May I ask have you checked withinh the below article(s)?:

Are the needed one and compatible ports with Cloudflare openned at the Origin/Host/Server and apps running on them (and not on the incompatible ones)?

Is Cloudflare allowed to connect to your origin/host?

Cloudflare IPv4 & IPv6 ranges can be found here:

Does your server run over HTTP or HTTPS?
May I also ask if you have had an SSL certificate installed at your host/origin server before adding your domain and changing nameservers to Cloudflare?

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