Information
nftables is a subsystem of the Linux kernel providing filtering and classification of network packets/datagrams/frames and is the successor to iptables.
nftables are installed as a dependency with firewalld.
Rationale:
Running firewalld and nftables concurrently may lead to conflict, therefore nftables should be stopped and masked when using firewalld.
Solution
Run the following command to mask and stop nftables
systemctl --now mask nftables
Notes:
firewalld is dependent on nftables. nftables should be stopped and disabled.