I'm new here at Digital Ocean
I installed a WP marketplace, I did it twice:
Social Network Center / 1 GB memory / 25 GB disk / FRA1 - Ubuntu WordPress on 18.04
Without having a look at your config I can not tell much but I believe that the problem is the following:
With backupbuddy you've specified your new URL with https://
As your domain is not pointing to the server's...