Observable looks unresponsive to me from few days, Here is the screenshot for reference.
Please help.
What do you see when you visit this URL?
It should be a blank page, and if you view source, youâll see something like this:
If youâre unable to view this pageâfor example if you see a gray page with a frowny face, as in your screenshotâthen I suspect you either have an ad blocker (or other browser extension) preventing the page from loading, or some sort networking problem.
Itâs also possible that a Chrome process has hung, in which case restarting your browser should fix the issue.
Visiting above URL give ERR_CERT_AUTHORITY_INVALID error.
Viewing source gives as shown above by you. (attached screenshot in next post as I can only one img in one post.)
Restarting the browser doesnât help.
Please help, Thanks
@mbostock Viewing source gives as shown here
One possible explanation is that your network is trying to intercept (MITM) your secure connection to Amazon; observableusercontent.com is currently hosted on Amazon CloudFront. Unfortunately, I donât think thereâs anything we can do on our end to fix this issue.
What do you see when click on the 
Not Secure in the address bar and then click on Certificate? If you expand the certificate details, you should see something like this:
1 Like