我尝试通过运行sudo apt-get update和sudo apt-get install gitlab-ce来更新GitLab。安装过程中一切看起来都很好，但安装完成后，nginx停止工作，我无法启动它。
运行后：sudo gitlab-ctl status，我得到这个：

run: gitlab-workhorse: (pid 4378) 8613s; run: log: (pid 937) 9953s
run: logrotate: (pid 19116) 1412s; run: log: (pid 933) 9953s
down: nginx: 0s, normally up, want up; run: log: (pid 943) 9953s
run: postgresql: (pid 4456) 8581s; run: log: (pid 939) 9953s
run: redis: (pid 4466) 8581s; run: log: (pid 935) 9953s
run: sidekiq: (pid 4474) 8578s; run: log: (pid 940) 9953s
run: unicorn: (pid 4496) 8576s; run: log: (pid 931) 9953s

我试着运行sudo gitlab-ctl reconfigure并重新启动，但没有任何帮助。我还试了sudo gitlab-ctl restart nginx，结果显示：
timeout: down: nginx: 0s, normally up, want up
有什么主意吗？谢谢！