Topic on Project:Support desk

Hello,

I just completed a fresh install of MediaWiki on my server, and I'm receiving this strange error:

Warning: openssl_encrypt(): Unknown cipher algorithm in /home/public_html/wiki/includes/session/Session.php on line 424

Fatal error: Class 'MediaWiki\Session\UnexpectedValueException' not found in /home/public_html/wiki/includes/session/Session.php on line 426

This happens when I attempt to log in. Please advise, thanks!

See https://phabricator.wikimedia.org/T136587

Okay, I don't know if this is recommended, but I went in and changed all "aes-256-ctr" encryption types to "aes-256-cbc" - there were two.

Also see Manual:$wgSessionInsecureSecrets!