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 uri="" encoding="&#x2713;" key="login" uuid="C7A74A94-C756-11F1-B3D4-63B20B50D6CE" method="post">
    <field widget="text" display="Username" value="" name="username" key="username" id="uuid-C7A77BAE-C756-11F1-B3D4-63B20B50D6CE" attrs=""/>
    <field attrs="" name="password" id="uuid-C7A7C654-C756-11F1-B3D4-63B20B50D6CE" key="password" widget="password" display="Password"/>
    <field widget="submit" display="Login" value="" name="submit" id="uuid-C7A81384-C756-11F1-B3D4-63B20B50D6CE" key="submit" attrs=""/>
  </form>
</response>