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="755BCE60-CDAD-11F1-BA8B-C8BB0B50D6CE" method="post" key="login" encoding="&#x2713;">
    <field attrs="" widget="text" id="uuid-755C0560-CDAD-11F1-BA8B-C8BB0B50D6CE" value="" display="Username" key="username" name="username"/>
    <field id="uuid-755C4F7A-CDAD-11F1-BA8B-C8BB0B50D6CE" widget="password" attrs="" key="password" name="password" display="Password"/>
    <field id="uuid-755C9AFC-CDAD-11F1-BA8B-C8BB0B50D6CE" widget="submit" attrs="" key="submit" name="submit" display="Login" value=""/>
  </form>
</response>