nftables is not accepting rules from ufw

[Brian Vaughan <bgvaughan@gmail.com>]

I saw today that ufw.service was failing on boot. From the error 
messages I get when executing 'ufw enable' (see below), it looks like 
nftables is not accepting the format of the rules from ufw. I've also 
tried 'ufw reset', but that didn't change the behavior.

I'm using ufw-0.36-1 and nftables-0.9.3-1. By the changelogs, ufw was 
last updated a year ago, but nftables was updated on December 3, 2019. 
I'm not completely sure which package I should file a bug against.

-----

# ufw enable

ERROR: problem running ufw-init
Bad argument `DROP'
Error occurred at line: 4
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
Bad argument `-'
Error occurred at line: 4
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
iptables-restore: line 2 failed
Bad argument `-'
Error occurred at line: 3
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
Bad argument `-'
Error occurred at line: 3
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
Bad argument `-'
Error occurred at line: 3
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
Bad argument `-'
Error occurred at line: 3
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
iptables-restore v1.8.4 (nf_tables): Chain 'ufw-user-input' does not exist
Error occurred at line: 2
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
Bad argument `DROP'
Error occurred at line: 4
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.
Bad argument `-'
Error occurred at line: 4
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.
ip6tables-restore: line 2 failed
Bad argument `-'
Error occurred at line: 3
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.
Bad argument `-'
Error occurred at line: 3
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.
Bad argument `-'
Error occurred at line: 3
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.
Bad argument `-'
Error occurred at line: 3
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.
ip6tables-restore v1.8.4 (nf_tables): Chain 'ufw6-user-input' does not exist
Error occurred at line: 2
Try `ip6tables-restore -h' or 'ip6tables-restore --help' for more 
information.

Problem running '/etc/ufw/user.rules'
Problem running '/etc/ufw/user6.rules'