supervisord - supervisorctl restart all 错误（生成错误）

Question

我安装主管sudo apt install supervisor
我在“/etc/supervisor/conf.d/websocket.conf”中设置了 wesocket.conf 文件。
在那里

[program:websocket]
command=/usr/bin/php /var/www/project/artisan websocket:serve
directory = /var/www/project
numprocs=1
autostart=true
autorestart=true
user=root

然后，我运行命令打击

在我的 ssh cmd

root@localhost:/etc/supervisor/conf.d# nano websocket.conf
root@localhost:/etc/supervisor/conf.d# supervisorctl update
websocket: stopped
websocket: updated process group
root@localhost:/etc/supervisor/conf.d# supervisorctl start websocket
websocket: ERROR (already started)
root@localhost:/etc/supervisor/conf.d# supervisorctl
websocket                        STARTING
supervisor> exit

root@localhost:/etc/supervisor/conf.d# supervisorctl restart all
websocket: stopped
websocket: ERROR (spawn error)
root@localhost:/etc/supervisor/conf.d#

** 哪里错了 **
请给我小费
谢谢