Hi there,
I checked your site, and currently, the Jetpack connection is not good. We will need first to resolve the issue here, and if the same error persists even after that, then we can go ahead with the next steps.
Why is the Jetpack connection not good?
While your site is publicly accessible, we cannot access your site’s XML-RPC file. This file is used by Jetpack and other plugins and apps to connect to your site. It must return the following message: XML-RPC?server accepts POST requests only.
You can see a working example here: https://jetpack.com/xmlrpc.php
Since you can see the Cloudflare is blocking your XML-RPC file. I would recommend you temporarily disable Cloudflare and try to connect Jetpack Boost again with your site. After connecting Boost, you can verify if Jetpack is get successfully connected by visiting here: https://jptools.wordpress.com/debug
If you see the message “Everything looks great!” then it means the Jetpack connection is good and now you can check if Blocked script execution in '<URL>' because the...
error is still there?
Let me know how it went!