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 key="login" uuid="1F78E742-D0F7-11F1-A0FF-A80F4A691810" uri="" encoding="&#x2713;" method="post">
    <field key="username" value="" display="Username" attrs="" widget="text" name="username" extra="" id="uuid-1F791BF4-D0F7-11F1-A0FF-A80F4A691810"/>
    <field widget="password" attrs="" name="password" key="password" id="uuid-1F79623A-D0F7-11F1-A0FF-A80F4A691810" display="Password" extra=""/>
    <field display="Login" value="" key="submit" id="uuid-1F79AE66-D0F7-11F1-A0FF-A80F4A691810" extra="" name="submit" attrs="" widget="submit"/>
  </form>
</response>