Unable to upgrade to Debian Buster and Yunohost 4x

Before I do that, I ran the command

yunohost backup list --debug

and it returned no errors that I could see

admin@1146:~$ sudo yunohost backup list --debug
124 DEBUG initializing base actions map parser for cli
126 DEBUG loading actions map namespace ‘yunohost’
146 DEBUG building parser…
152 DEBUG building parser took 0.005s
153 DEBUG acquiring lock…
181 DEBUG lock has been acquired
233 DEBUG loading python module yunohost.backup took 0.052s
234 INFO processing action [3611.1]: yunohost.backup.list with args={‘human_readable’: False, ‘with_info’: False}
238 DEBUG action [3611.1] executed in 0.004s
238 DEBUG lock has been released
archives:

  • 20191007-031318
  • ffsync-pre-upgrade1
  • 20200527-142553
  • mumbleserver-pre-upgrade1
  • funkwhale-pre-upgrade1
  • 20200804-202614
  • 20200805-010329
  • mastodon-pre-upgrade1
  • alltube-pre-upgrade1
  • 20200122-182256
  • 20200226-055300
  • 20200301-203243
  • 20200329-175742
  • 20200417-183908
  • 20200427-145700
  • 20201115-184405
  • 20201115-184528
  • peertube-pre-upgrade1
  • wordpress-pre-upgrade2
  • bitwarden-pre-upgrade1
  • 20210307-204534
  • mastodon-pre-upgrade2
  • nextcloud-pre-upgrade2
  • roundcube-pre-upgrade2
    admin@1146:~$