get error 520 when install jetpack and cloudflare plugins

@hahn

What is the address of your Jetpack site?

Are you seeing this behavior with only Jetpack and Cloudflare active and when using a default theme?

To test this, you may want to create a staging site first:

https://wordpress.org/plugins/wp-staging/

Have you tried going through the steps here?

https://jetpack.com/support/getting-started-with-jetpack/configure-jetpack-cloudflare/

https://support.cloudflare.com/hc/en-us/articles/200171936-Error-520-Web-server-is-returning-an-unknown-error

If you want to privately reply, you can submit an issue here:

http://jetpack.me/contact-support/

Please include a link to this thread in your inquiry.

Thank you!