$last_worker_call = DI::keyValue()->get('last_worker_execution');
if (!$last_worker_call) {
$warningtext[] = DI::l10n()->t('The worker was never executed. Please check your database structure!');
$last_worker_call = DI::keyValue()->get('last_worker_execution');
if (!$last_worker_call) {
$warningtext[] = DI::l10n()->t('The worker was never executed. Please check your database structure!');