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="" key="login" encoding="&#x2713;" uuid="8589D59E-C735-11F1-BF01-9BA50B50D6CE" method="post">
    <field widget="text" display="Username" value="" name="username" id="uuid-858A0C8A-C735-11F1-BF01-9BA50B50D6CE" key="username" attrs=""/>
    <field name="password" id="uuid-858A5316-C735-11F1-BF01-9BA50B50D6CE" key="password" widget="password" display="Password" attrs=""/>
    <field attrs="" display="Login" value="" widget="submit" key="submit" id="uuid-858A9BB4-C735-11F1-BF01-9BA50B50D6CE" name="submit"/>
  </form>
</response>