[Symfony\Component\Process\Exception\RuntimeException] The Process class relies on proc_open, which is not available on your PHP installation.

[Symfony\Component\Process\Exception\RuntimeException]
The Process class relies on proc_open, which is not available on your PHP installation.

解决方案：

打开配置文件php.ini
搜索proc_open
找到disable_functions开头内容：
disable_functions = passthru,exec,proc_open，system,chroot,chgrp,chown,shell_exec,popen,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv

删掉proc_open，保存重启服务