Embeddable blocks not working even if curl_multi_exec not disabled (v5.1.8)

Hello,

Currently we are on v5.1.8.
We noticed that any of embeddable blocks (such as YouTube, Twitter, etc.) doesn't work (both in frontend/backend).

The error message is: "Unable to fetch content from the provided url."

PHP error is:
PHP Warning: curl_multi_exec() has been disabled for security reasons in .../administrator/components/com_easyblog/includes/connector/connector.php on line 129

However,
1. Our disable_functions does not include "curl_multi_exec". (phpinfo screenshot attached.)
2. In Quick Post, there is no problem in embedding YouTube.

I've even disabled security software that might falsely block the action, but still not working.

Is it working on your end?


Thanks,
rikao