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="" uuid="D6E78144-73BA-11F1-9C57-A9AEF8248A5F" method="post" encoding="&#x2713;" key="login">
    <field attrs="" widget="text" display="Username" id="uuid-D6E7D19E-73BA-11F1-8014-A9AEF8248A5F" value="" name="username" key="username"/>
    <field id="uuid-D6E82234-73BA-11F1-8014-A9AEF8248A5F" key="password" name="password" widget="password" attrs="" display="Password"/>
    <field key="submit" name="submit" value="" id="uuid-D6E86C3A-73BA-11F1-8014-A9AEF8248A5F" display="Login" widget="submit" attrs=""/>
  </form>
</response>