hello monks, I am trying to run this basic app in perl: 
use Dancer2;
set serializer => 'Mutable';
get '/user/:id' => sub {
    my $id   = params->{id};
    return { id => $id, name => 'frank' };
}
dance;

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I then call this url curl -H 'Accept-Type: text/xml' http://localhost:5000/user/1 I expect it to return <data name="franck" id="1" /> But instead I am receiving this error: 
 {"id" => 1,"name" => "frank"} did not pass type constraint "Value" (i
+n $self->{"content"})
    "Value" is defined as: (defined($_) and not ref($_)) in /usr/local
+/share/perl5/Dancer2/Core/App.pm l. 1473

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I am running hopeless!! Any help would do. Thanks

In reply to Dancer2 serializer mutable by perl_help27

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