更新后MUP部署的站点不显示

I used Meteor Up (MUP) to deploy my meteor app to a Digital Ocean droplet. I had some problems with deploying it the first time but I solved all of them and I got it working. I then made some updates to my app but when I deployed it again the page says "This webpage is not available". I have tried re-deploying the app on new droplets with different IP addresses but the same happens. I have run I used Meteor Up (MUP) to deploy my meteor app