Cloudflare

In short, you have to turn off ‘proxy status’ to make it work

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1.

Click DNS 

2.

Set proper values. CNAME for Type, subdomain name that you want for Name (e.g. www) and notion2.oopy.io for Target. Please set the Proxy status to DNS only .

3.

Go on connecting process in the admin.

4.

You may change the Proxy status to Proxied ,after the process is finished

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If you have TOO_MANY_REDIRECTS problem with Proxied. Please check the SSL/TLS setting in cloudflare, it should be Full.

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If you can’t change SSL/TLS setting to Full for some reasons, you have to use DNS only mode.