rkwynn on "[Plugin: Mail Subscribe List] Error message appears on page"

I get this message on my page:

: mysql_query(): No such file or directory in on line

: mysql_query(): A link to the server could not be established in on line

: mysql_num_rows() expects parameter 1 to be resource, boolean given in on line
HELP!!!1 :)

https://wordpress.org/plugins/mail-subscribe-list/