Class '\EventBase' not found in

运行20天后，安装了event插件后，再启动gateway worker，出现了如下错误：

Worker process terminated with ERROR: E_ERROR "Uncaught Error: Class '\EventBase' not found in /www/php/GatewayWorker/vendor/workerman/workerman/Events/Event.php:65
Stack trace:
#0 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(2286): Workerman\Events\Event->__construct()
#1 /www/php/GatewayWorker/vendor/workerman/gateway-worker/src/Gateway.php(276): Workerman\Worker->run()
#2 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(1452): GatewayWorker\Gateway->run()
#3 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(1282): Workerman\Worker::forkOneWorkerForLinux(Object(GatewayWorker\Gateway))
#4 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(1256): Workerman\Worker::forkWorkersForLinux()
#5 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(1586): Workerman\Worker::forkWorkers()
#6 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(1535): Workerman\Worker::monitorWorkersForLinux()
#7 /www/php/GatewayWorker/vendor/workerman/workerman/Worker.php(509): Workerman\Worker::monitorWorkers()
#8 /w in /www/php/GatewayWorker/vendor/workerman/workerman/Events/Event.php on line 65"
Workerman stopping ...
worker exit with status 65280
worker exit with status 65280
worker exit with status 65280
worker exit with status 65280
worker exit with status 65280
worker exit with status 65280
Workerman has been stopped