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 encoding="&#x2713;" method="post" uri="" key="login" uuid="ACBC414A-D18C-11F1-B041-31CB0B50D6CE">
    <field name="username" extra="" widget="text" id="uuid-ACBC74BC-D18C-11F1-B041-31CB0B50D6CE" attrs="" key="username" value="" display="Username"/>
    <field extra="" widget="password" id="uuid-ACBCBD6E-D18C-11F1-B041-31CB0B50D6CE" display="Password" attrs="" name="password" key="password"/>
    <field name="submit" id="uuid-ACBD0954-D18C-11F1-B041-31CB0B50D6CE" widget="submit" extra="" key="submit" attrs="" display="Login" value=""/>
  </form>
</response>