System error

error:  Can't call method "selectall_arrayref" on an undefined value at /home/hosting/milrussia/lib/TagUtils.pm line 453.
context: 
... 
449: 
450:  mr::core::std_out("\nmr::TagUtils::selectall_arrayref: ");
451:  foreach my $row (@_) { mr::core::std_out($row);};
452: 
453:  return $mr::dbh->selectall_arrayref(@_);
454:  }
455: 
456:  sub selectcol_arrayref {
457: 
... 
code stack:  /home/hosting/milrussia/lib/TagUtils.pm:453
/home/hosting/milrussia/lib/TagUtils.pm:129
/home/hosting/milrussia/lib/TagUtils.pm:149
/home/hosting/milrussia/lib/mr/card.pm:70
/home/hosting/militera.org/html/0/scripts/_showbook.html:10
raw error






























Can't call method "selectall_arrayref" on an undefined value at /home/hosting/milrussia/lib/TagUtils.pm line 453.


Trace begun at /usr/local/share/perl/5.28.1/HTML/Mason/Exceptions.pm line 125
HTML::Mason::Exceptions::rethrow_exception('Can\'t call method "selectall_arrayref" on an undefined value at /home/hosting/milrussia/lib/TagUtils.pm line 453.^J') called at /home/hosting/milrussia/lib/TagUtils.pm line 453
TagUtils::selectall_arrayref('select id, name, record_key from types order by id') called at /home/hosting/milrussia/lib/TagUtils.pm line 129
TagUtils::read_types at /home/hosting/milrussia/lib/TagUtils.pm line 149
TagUtils::get_type_id('template') called at /home/hosting/milrussia/lib/mr/card.pm line 70
mr::card::template_by_card(60149, 'template') called at /home/hosting/militera.org/html/0/scripts/_showbook.html line 10
HTML::Mason::Commands::__ANON__('card', 60149) called at /usr/local/share/perl/5.28.1/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x55c61c2ed900)', 'card', 60149) called at /usr/local/share/perl/5.28.1/HTML/Mason/Request.pm line 1300
eval {...} at /usr/local/share/perl/5.28.1/HTML/Mason/Request.pm line 1292
HTML::Mason::Request::comp(undef, undef, undef, 'card', 60149) called at /usr/local/share/perl/5.28.1/HTML/Mason/Request.pm line 481
eval {...} at /usr/local/share/perl/5.28.1/HTML/Mason/Request.pm line 481
eval {...} at /usr/local/share/perl/5.28.1/HTML/Mason/Request.pm line 433
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0x55c61c2e7d98)') called at /usr/local/share/perl/5.28.1/HTML/Mason/ApacheHandler.pm line 168
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0x55c61c2e7d98)') called at /usr/local/share/perl/5.28.1/HTML/Mason/ApacheHandler.pm line 825
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x55c61c2e12c0)', 'Apache2::RequestRec=SCALAR(0x55c61aa28b60)') called at (eval 23) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0x55c61aa28b60)') called at -e line 0
eval {...} at -e line 0