Error:Undefined index: coreUnknown on line 141

Hello there,

Wordfence Security, Version 6.1.12

I have many errors like:

Undefined index: coreUnknown in /usr/local/apache/htdocs/www.mydomain.com/wp-content/plugins/wordfence/lib/wordfenceHash.php on line 141

An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in <b>/usr/local/apache/htdocs/www.mydomain.com/wp-includes/update.php</b> on line <b>123</b>
0

Also when choose “See how the file has changed. ” opens another window, with message: “WordFence API error: An error occured trying to open the requested file.”

Any idea what I can do?

Best regards

https://wordpress.org/plugins/wordfence/