Error deleting ports on FirewallD

Operating system: Debian 10
OS version: fresch Virtualmin install latest version
when deleting ports on FirewallD an error is generated:
Failed to apply configuration : Error: COMMAND_FAILED: ‘/usr/sbin/ip6tables-restore -w -n’ failed: ip6tables-restore v1.8.2 (nf_tables): line 4: RULE_REPLACE failed (No such file or directory): rule in chain OUTPUT

How can I fix it?

Thanks in advance.
Giovanni

Usually Debian’s firewall is user’s choice so it’s possible that support for iptables on your system isn’t complete. Like the case of Fedora with a custom kernel discussed here (that started with an error similar to yours): https://bugzilla.redhat.com/show_bug.cgi?id=1645370

There may be similar articles about the error in Debian circles.

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