Getting Errors when try to update or install plugins

Warning: 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 /home3/donaldf/public_html/wp-includes/update.php on line 120

Warning: 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 /home3/donaldf/public_html/wp-includes/update.php on line 267

Warning: 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 /home3/donaldf/public_html/wp-includes/update.php on line 407
is error gettign when update or install pllugins on my one site
How woudl I fix this?