root@300hO:/tmp# uname -au
Linux 300hO 5.4.154 #0 Sun Oct 24 09:01:35 2021 mips GNU/Linux
root@300hO:/tmp# cat /proc/cpuinfo
system type : Atheros AR7161 rev 2
machine : Buffalo WZR-HP-AG300H
processor : 0
cpu model : MIPS 24Kc V7.4
BogoMIPS : 451.58
wait instruction : yes
microsecond timers : yes
tlb_entries : 16
extra interrupt vector : yes
hardware watchpoint : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc, 0x0ffb, 0x0ffb]
isa : mips1 mips2 mips32r1 mips32r2
ASEs implemented : mips16
Options implemented : tlb 4kex 4k_cache prefetch mcheck ejtag llsc dc_aliases perf_cntr_intr_bit perf
shadow register sets : 1
kscratch registers : 0
package : 0
core : 0
VCED exceptions : not available
VCEI exceptions : not available

root@300hO:/tmp# opkg install nrserver-2.3.1.4360-free-barrier_breaker-ar71xx.ipk
Segmentation fault
root@300hO:/tmp#

when I switched over to the pro version, nrserver-2.6.2.5020-pro-openwrt1806-mips_24kc.ipk

I got,

Error loading shared library libssl.so.1.0.0: No such file or directory (needed by /tmp/openssl)
Error loading shared library libcrypto.so.1.0.0: No such file or directory (needed by /tmp/openssl)
...million lines of similar synbol not found


looks like the pkg was compiled against some older libs. please help on openwrt-21.02.1-ath79-generic. thanks.