Fail Plugin Portico in OJS 3.1.1.0

I have used the plugin @jmacgreg, in my version of OJS 3.1.1.0

I have added the ftl utl, username and password in the configuration section.

But when exporting a number, both when I select to export to FTP or to my team, I jump a blank screen. And I can not continue.

How can I solve this problem?