I can reproduce this error on non-production machine and found this
error is resolved by re-bulding updated nftables, libmnl and libnftnl:

With these versions nft rules now load without error:

 - nftables commit de904e22faa2e450d0d4802e1d9bc22013044f93
 - libmnl   commit 54dea548d796653534645c6e3c8577eaf7d77411
 - libnftnl commit 5c5a8385dc974ea7887119963022ae988e2a16cc

All were compiled on machine running 6.19.4.[REGRESSION] 6.19.4 stable netfilter / nftables [resolved]Genes Lists <lists@sapience.com> undefinedThorsten Leemhuis <regressions@leemhuis.info>, linux-kernel@vger.kernel.org, coreteam@netfilter.org, netfilter-devel@vger.kernel.org, Pablo Neira Ayuso <pablo@netfilter.org>, Greg KH <gregkh@linuxfoundation.org> undefined undefined undefined undefined undefined undefined undefined undefined undefined�/��Z