$Request ||= 'bw';
$Request = 'lotv' if $Request eq '2';
-my %scver = %{ $scvers{$Request} }
- or Abort("Requested version $Request not available", '404 unknown');
+my %scver = %{ $scvers{$Request} // {} }
+ or Html(), Abort("Requested version <q>$Request</q> not available", '404 request not found');
my $datafile = "sc-units-$Request.inc.pl";