Can not run the MounteBank first example

Question

I tried to run the first example of MounteBank documentation but it fail. I followed the initial setup:

imposters.ejs
{
  "imposters": [
    <% include originServer.ejs %>,
    <% include proxyServer.ejs %>
  ]
}

And after I ran: mb --configfile imposters.ejs --allowInjection --localOnly

But I receive this error log:

SyntaxError: Invalid or unexpected token in imposters.ejs while compiling ejs

I've tried to change the ejs include syntax to something like this:

<% include 'originServer.ejs' %>,
<% include 'proxyServer.ejs' %>
OR
<% include('originServer.ejs'); %>,
<% include ('proxyServer.ejs'); %>

But for each change the error is:

Error: Could not find the include file...