Reverse setfacl without sudo or root

I have used command sudo setfacl -R -m u:ubuntu:rwx .. Unfortunately, by mistake on root directory, stopped it in a middle, but to late. I hoped to revere it by using sudo setfacl -bR / however now I believe I lost sudo access. ubuntu@oracle-free-vm: ~ $ sudo setfacl -bR / sudo: /etc/sudo.conf is group writable sudo: /etc/sudo.conf is group writable sudo: error in /etc/sudo.conf, line 0 while loading plugin "sudoers_policy" sudo: /usr/libexec/sudo/sudoers.so must be only be writable by owner sudo: fatal error, unable to load plugins This is a free instance on Oracle cloud, so I have no direct access to the system. I'm having trouble with su - as I can't seem to know the password for root account, it might be disabled. Is there any way to reverse changes made by setfacl or get to root to run a fix command? Or have I just lost all work and need to do reinstall?