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 uuid="E4D55B2C-7E8D-11F1-88F5-DDAC2C3515A0" encoding="&#x2713;" uri="" key="login" method="post">
    <field attrs="" name="username" widget="text" key="username" id="uuid-E4D58EBC-7E8D-11F1-88F5-DDAC2C3515A0" display="Username" value=""/>
    <field name="password" attrs="" key="password" widget="password" id="uuid-E4D5D23C-7E8D-11F1-88F5-DDAC2C3515A0" display="Password"/>
    <field attrs="" name="submit" key="submit" widget="submit" id="uuid-E4D61BD4-7E8D-11F1-88F5-DDAC2C3515A0" value="" display="Login"/>
  </form>
</response>