custom domain works but www subdomain doesn't

Alrighty, I have a repl to host my website. I have a custom domain linked to the repl.

Whenever I type "", it works. But whenever I type "", I get a "Error 525: SSL Handshake Failed" screen from CloudFlare and I'm pretty sure it's caused by a "Run REPL to see output" screen.

I have my CNAME records setup like this:

How do I get "" to stop displaying the error?

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however, under further examination, i have to change it back to full, because for some reason that just returns err_too_many_redirects, leaving my site unusable