Error building the firmware image: Unsupported target: bcm27xx/bcm2711

Error building the firmware image

Server response: Unsupported target: bcm27xx/bcm2711
Please report the error message and request
Request Data:
{
"url": "https://sysupgrade.openwrt.org",
"revision": "r16554-1d4dea6d4f",
"advanced_mode": "0",
"branch": "21.02",
"efi": null,
"profile": "raspberrypi,4-compute-module",
"target": "bcm27xx/bcm2711",
"version": "21.02.6",
"packages": [
"auc",
"base-files",
"bcm27xx-gpu-fw",
"bcm27xx-userland",
"busybox",
"ca-bundle",
"cgi-io",
"cypress-firmware-43455-sdio",
"cypress-nvram-43455-sdio-rpi-4b",
"dnsmasq",
"dropbear",
"e2fsprogs",
"ethtool",
"fdisk",
"firewall",
"fstools",
"hostapd-common",
"ip6tables",
"iptables",
"iwinfo",
"kernel",
"kmod-brcmfmac",
"kmod-fs-vfat",
"kmod-ipt-offload",
"kmod-nls-cp437",
"kmod-nls-iso8859-1",
"kmod-r8169",
"kmod-sound-arm-bcm2835",
"kmod-sound-core",
"kmod-usb-dwc2",
"kmod-usb-hid",
"libc",
"libevdev",
"libgcc",
"libiwinfo",
"libiwinfo-data",
"libiwinfo-lua",
"libopenssl",
"libpci",
"libudev-zero",
"libustream-wolfssl",
"logd",
"luci",
"luci-app-attendedsysupgrade",
"luci-app-opkg",
"luci-app-ttyd",
"luci-base",
"luci-i18n-attendedsysupgrade-en",
"luci-i18n-attendedsysupgrade-fr",
"luci-i18n-base-en",
"luci-i18n-base-fr",
"luci-mod-network",
"luci-mod-status",
"luci-mod-system",
"luci-ssl",
"luci-theme-bootstrap",
"mkf2fs",
"mtd",
"netifd",
"odhcp6c",
"odhcpd-ipv6only",
"opkg",
"partx-utils",
"pciutils",
"ppp",
"ppp-mod-pppoe",
"procd",
"px5g-wolfssl",
"uci",
"uclient-fetch",
"urandom-seed",
"usbutils",
"wireless-regdb",
"wpad-basic-wolfssl",
"zlib"
],
"diff_packages": true,
"filesystem": "ext4",
"client": "luci/git-22.210.54423-3b0b325"
}

Start by examining the reported request to https://sysupgrade.openwrt.org, especially target bcm27xx/bcm2711 and profile raspberrypi,4-compute-module, and reproduce the unsupported-target response. Trace how the service handles that target and determine what validation or image-building behavior is expected. Done means the request is accepted or the unsupported configuration is clearly handled.