Adding a bit corrected snippet to .htaccess has helped me:
# BEGIN Really Simple SSL
Header always set Content-Security-Policy "upgrade-insecure-requests"
Header always set Strict-Transport-Security: "max-age=31536000" env=HTTPS
Header always set X-Content-Type-Options "nosniff"
Header always set X-XSS-Protection "1; mode=block"
Header always set Expect-CT "max-age=7776000, enforce"
Header always set Referrer-Policy: "no-referrer-when-downgrade"
# END Really Simple SSL
Thanks to everyone for a fix!
Had the same issue. I fixed it! Took me a while to find a plugin it caused and editing the plugin .php didn’t help. But I fixed it adding a snippet of code to functions.php of the CHILD theme:
function mymodule_curl_before_request($curlhandle){
session_write_close();
}
add_action( ‘requests-curl.before_request’,’mymodule_curl_before_request’, 9999 );
Worked perfect! Found a solution here:
https://de.wordpress.org/support/topic/curl-error-28-und-andere-fehlermeldungen/
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This reply was modified 5 years, 3 months ago by sirindesigns.
