Exception 'Error' with message 'Class 'Cron\CronExpression' not found'

[jinpy666]

[root@localhost acct]# ./yii schedule/run --scheduleFile=@common/config/schedule.php
Exception 'Error' with message 'Class 'Cron\CronExpression' not found'

in /usr/share/nginx/html/acct/vendor/omnilight/yii2-scheduling/src/Event.php:206

Stack trace:
#0 /usr/share/nginx/html/acct/vendor/omnilight/yii2-scheduling/src/Event.php(192): omnilight\scheduling\Event->expressionPasses()
#1 /usr/share/nginx/html/acct/vendor/omnilight/yii2-scheduling/src/Schedule.php(96): omnilight\scheduling\Event->isDue(Object(yii\console\Application))
#2 [internal function]: omnilight\scheduling\Schedule->omnilight\scheduling{closure}(Object(omnilight\scheduling\Event))
#3 /usr/share/nginx/html/acct/vendor/omnilight/yii2-scheduling/src/Schedule.php(97): array_filter(Array, Object(Closure))
#4 /usr/share/nginx/html/acct/vendor/omnilight/yii2-scheduling/src/ScheduleController.php(50): omnilight\scheduling\Schedule->dueEvents(Object(yii\console\Application))
#5 [internal function]: omnilight\scheduling\ScheduleController->actionRun()
#6 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#7 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#8 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/console/Controller.php(164): yii\base\Controller->runAction('run', Array)
#9 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/base/Module.php(528): yii\console\Controller->runAction('run', Array)
#10 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/console/Application.php(180): yii\base\Module->runAction('schedule/run', Array)
#11 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/console/Application.php(147): yii\console\Application->runAction('schedule/run', Array)
#12 /usr/share/nginx/html/acct/vendor/yiisoft/yii2/base/Application.php(386): yii\console\Application->handleRequest(Object(yii\console\Request))
#13 /usr/share/nginx/html/acct/yii(23): yii\base\Application->run()
#14 {main}