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="" encoding="&#x2713;" method="post" uuid="FC3E153A-7251-11F1-B959-BF57242F1D8B" key="login">
    <field widget="text" value="" id="uuid-FC3F02F6-7251-11F1-9594-BF57242F1D8B" key="username" attrs="" display="Username" name="username"/>
    <field widget="password" id="uuid-FC3F411C-7251-11F1-9594-BF57242F1D8B" key="password" display="Password" name="password" attrs=""/>
    <field key="submit" attrs="" display="Login" name="submit" widget="submit" value="" id="uuid-FC3F9DC4-7251-11F1-9594-BF57242F1D8B"/>
  </form>
</response>