positiveshiftin on "WP4.5 upgrade mysql_connect() error"

WP 4.5 upgrade is giving error -

Waing: mysql_connect(): Headers and client library minor version mismatch. Headers:50546 Library:50627 in /home/jobs46bx/public_html/wp-includes/wp-db.php on line 1515

Waing: Cannot modify header information - headers already sent by (output started at /home/jobs46bx/public_html/wp-includes/wp-db.php:1515) in /home/jobs46bx/public_html/wp-includes/pluggable.php on line 1171

Unable to get wp-admin page.

I have tried to FTP the file and remove the last blank line. But the issue seems to be on mysql_connect() line.

My website http://www.jobs4skills.com/wp-admin
Help please.

Hi positiveshiftin. Don't know if this is related to your specific issue but you might check the last post in this topic (which is at the top of this forum):
https://wordpress.org/support/topic/read-this-first-wordpress-45-master-list

@bdbrown - are you sure the last post on the above link is same issue, that talks about mysqli_real_connect() whereas mine is about mysql_connect().

I tried to change wp_config.php as suggested didn't work.

Any other thoughts anyone pls help.