Jupiter-notbook fails to run after changing name server to cloudflare

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It is using AWS. The Cloud Flare platform was used to receive SSL certificates. I changed the name server. Before changing the name server, the jupiter-notbook did well. After changing the name server to Cloud Flare, jupiter-notbook does not run.

Why is this happening?

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and I tried https://, but error

Maybe that port is not proxied by cloudflare?

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