EPESI requires a password for the MySQL user.
That do not causes issues on a live install, as mysql user should always have a password.
But when testing with a local server (as XAMPP or Wamp) its a common practice to not have passwords for mysql user (usually the root user).
So this filed shouldn't be a requirement when installing EPESI.
But it is!
[color=#800000:3gojxw1x]Note 1: if you already have XAMPP /wamp with other PHP applications installed, don't create a password for the root user.
It will work for the EPESI install but you will loose access using PHPmyAdmin (and other applications on those servers) because they was created before as a "no password" usage.
Instead create a new Mysql user with a password to be used with EPESI (and leave root without password.[/color:3gojxw1x]