I can’t log into intensedebate.com in WP-Admin is blocked ERR_BLOCKED_BY_RESPONSE

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I did: Login from comment section aft I install the plugin
I saw: this error message on the browser:-

intensedebate.com is blocked
intensedebate.com refused to connect.
ERR_BLOCKED_BY_RESPONSE

I expected:
I tried to all possible way to allow the iframe to be displayed from
My server (nginx) setting, but seems this issue related to something else.
This is my current server configuration, and I don’t think it is the reason connection are blocked.

add_header ‘Access-Control-Allow-Origin’
‘${scheme}://intensedebate.com/’ always;
add_header ‘X-Frame-Options’ ‘ALLOW-FROM
${scheme}://intensedebate.com/’ always;
add_header ‘Content-Security-Policy’ “frame-ancestors ‘self’
‘intensedebate.com'”;

add_header ‘X-Frame-Options’ ‘SAMEORIGIN, GOFORIT’;

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