521 error cloudflare

I’m getting a 521 error after i setup Cloudflare DNS and ssl I switched from flexible to full and full strict and kept getting 521 error i then moved back to flexible and then get a 522 error and i setup droplet firewall to be on 443 but still getting 521 error

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If you have not configured an SSL certificate on your droplet, you would need to open port 80 as well so that CloudFlare could connect to the droplet.

I would recommend checking out the official documentation on how to set that up as well:

And also if you are interested in setting up end to end HTTPS, you could take a look at this article here:

Regards, Bobby