I am also seeing this error for auc on 22.03 for RT3200:
Downloading file:packages/Packages.sig
Signature check failed.
Remove wrong Signature file.
Collected errors:
* pkg_hash_check_unresolved: cannot find dependency kmod-nft-nat6 for firewall4
* pkg_hash_fetch_best_installation_candidate: Packages for firewall4 found, but incompatible with the architectures configured
* opkg_install_cmd: Cannot install package firewall4.
* satisfy_dependencies_for: Cannot satisfy the following dependencies for luci:
* kmod-nft-nat6
* opkg_install_cmd: Cannot install package luci.
make[2]: *** [Makefile:169: package_install] Error 255
make[1]: *** [Makefile:134: _call_manifest] Error 2
make: *** [Makefile:253: manifest] Error 2
Error: Impossible package selection
Bad message (74)
This is with trying to update to the 464f349 commit on the 22.03 branch using auc.