For me, the hanging issue was fixed by running apt-get update and apt-get dist-upgrade to update my droplet. I’m on Ubuntu 20.04 and once I ran those commands and Alan tried the rebuild again, it worked without hanging. And once Discourse was up to date, my Oops screen went away and all is well. Might have been unique to 20.04 or something else that got refreshed when I updated everything, but hopefully that can help others.