Hi @arshankhanifar! Besides the excellent guide and the Cloudflare certs approach posted above, the other option might be to switch to DNS verification — this way the CA won’t have to actually hit the HTTP TLS endpoint to check ownership, so you won’t have Cloudflare trying to answer the verification challenge (which will fail the challenge, that’s why it doesn’t work right now unless you turn off proxying). See this discussion here as well: Can I use CloudFlare proxying with Fly certificates ?
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