In this other
post many mention an issue since May, specifically : PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'number' cannot be null in /var/www/vhosts/project1999.com/httpdocs/account/ls_resetpw_send.php on line 57
This is a server-side database error that can only be fixed by an admin, though it should be an easy fix.
EmperorCrush offered $50 and received no response, so, I don't believe this will be fixed soon.