Attended sysupgrade failed WRT3200ACM

Server response: The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.
{
"url": "https://sysupgrade.openwrt.org",
"revision": "r16847-f8282da11e",
"advanced_mode": "1",
"branch": "21.02",
"efi": null,
"profile": "linksys,wrt3200acm",
"target": "mvebu/cortexa9",
"version": "22.03.5",
"packages": [
"adguardhome",
"attendedsysupgrade-common",
"base-files",
"block-mount",
"busybox",
"ca-bundle",
"cgi-io",
"curl",
"ddns-scripts",
"ddns-scripts-noip",
"dnsmasq",
"dropbear",
"e2fsprogs",
"fdisk",
"firewall",
"fstools",
"fwtool",
"gdisk",
"getrandom",
"ip6tables",
"iptables",
"iwinfo",
"jshn",
"jsonfilter",
"kernel",
"kmod-btmrvl",
"kmod-fs-ext4",
"kmod-gpio-button-hotplug",
"kmod-ip6tables",
"kmod-ipt-conntrack",
"kmod-ipt-core",
"kmod-ipt-nat",
"kmod-ipt-offload",
"kmod-lib-crc-ccitt",
"kmod-mwlwifi",
"kmod-nf-conntrack",
"kmod-nf-conntrack6",
"kmod-nf-flow",
"kmod-nf-ipt",
"kmod-nf-ipt6",
"kmod-nf-nat",
"kmod-nf-reject",
"kmod-nf-reject6",
"kmod-ppp",
"kmod-pppoe",
"kmod-pppox",
"kmod-slhc",
"libblobmsg-json",
"libc",
"libip4tc",
"libip6tc",
"libiwinfo",
"libiwinfo-data",
"libiwinfo-lua",
"libjson-c",
"libjson-script",
"liblua",
"liblucihttp",
"liblucihttp-lua",
"libnl-tiny",
"libubox",
"libubus",
"libubus-lua",
"libuci",
"libuclient",
"libustream-wolfssl",
"libwolfssl",
"libxtables",
"logd",
"lua",
"luci",
"luci-app-acl",
"luci-app-advanced-reboot",
"luci-app-attendedsysupgrade",
"luci-app-ddns",
"luci-app-firewall",
"luci-app-nlbwmon",
"luci-app-opkg",
"luci-app-vnstat2",
"luci-base",
"luci-lib-base",
"luci-lib-ip",
"luci-lib-jsonc",
"luci-lib-nixio",
"luci-mod-admin-full",
"luci-mod-network",
"luci-mod-status",
"luci-mod-system",
"luci-proto-ipv6",
"luci-proto-ppp",
"luci-ssl",
"luci-theme-bootstrap",
"mtd",
"mwlwifi-firmware-88w8964",
"netifd",
"odhcp6c",
"odhcpd-ipv6only",
"openwrt-keyring",
"opkg",
"ppp",
"ppp-mod-pppoe",
"procd",
"px5g-wolfssl",
"rpcd",
"rpcd-mod-file",
"rpcd-mod-iwinfo",
"rpcd-mod-luci",
"rpcd-mod-rrdns",
"ubi-utils",
"uboot-envtools",
"ubox",
"ubus",
"ubusd",
"uci",
"uclient-fetch",
"uhttpd",
"uhttpd-mod-ubus",
"urandom-seed",
"urngd",
"usbutils",
"usign",
"wpad-basic-wolfssl"
],
"diff_packages": true,
"filesystem": "squashfs",
"client": "luci/git-22.210.54423-3b0b325"
}

Start by reproducing the supplied request against https://sysupgrade.openwrt.org using the listed revision, profile, target, version, and packages, then inspect the server-side error handling and logs. Done means this WRT3200ACM request completes without the reported internal server error.