XSLT Error

Empty filename at /home/ubuntu/perl5/perlbrew/perls/perl-5.18.0/lib/site_perl/5.18.0/Chameleon5/Template/XSLT.pm line 575.

Response XML

<?xml version="1.0"?>
<response>
  <form key="login" method="post" uri="" encoding="&#x2713;" uuid="CC371B24-42A0-11F1-9FBB-59B50C0019C7">
    <field attrs="" value="" id="uuid-CC374D24-42A0-11F1-9FBB-59B50C0019C7" key="username" widget="text" display="Username" name="username"/>
    <field key="password" id="uuid-CC3795E0-42A0-11F1-9FBB-59B50C0019C7" attrs="" widget="password" display="Password" name="password"/>
    <field display="Login" name="submit" key="submit" value="" id="uuid-CC37E4BE-42A0-11F1-9FBB-59B50C0019C7" attrs="" widget="submit"/>
  </form>
</response>