Device: Netgear WAC104 = Links for the Release 21.02.1 are wrong
See: https://openwrt.org/toh/netgear/wac104
Correct is:
Firmware Install:
http://downloads.openwrt.org/releases/21.02.1/targets/ramips/mt7621/openwrt-21.02.1-ramips-mt7621-netgear_wac104-squashfs-factory.img
Firmware Upgrade:
http://downloads.openwrt.org/releases/21.02.1/targets/ramips/mt7621/openwrt-21.02.1-ramips-mt7621-netgear_wac104-squashfs-sysupgrade.bin