I keep receving this error when importing demo data. I had the same problem w/ the plugin’s but was able to manually download and install them.
An error occurred while fetching file from: https://api.shufflehound.com/jevelin/ocdi_wpbakery_files/portfolio_minimalistic/portfolio_minimalistic_content.xml?v=7!
Reason: http_request_failed – cURL error 60: SSL certificate problem: certificate has expired.
Can you please test it via your website HTTPS version? As it is recommended for every website to work HTTPS only otherwise browser will show that the website is not secure and Google score can be impacted in negative way.