$RT::Logger->error($error);
-if ( defined $session{'SessionType'} && $session{'SessionType'} eq 'REST' ) {
+if ( $session{'REST'} ) {
$r->content_type('text/plain');
$m->out( "Error: " . $Why . "\n" );
$m->out( $Details . "\n" ) if defined $Details && length $Details;