So I'm basically gonna copy and paste my post from the Zyxel community site.

Model: Zyxel NWA50AX

I was trying to perform a software update and had a power glitch and now I am stuck in a boot loop. Connecting to a PC / router and I only see activity on the ethernet port for about 5 seconds. I was able to connect to the Console port to watch activity go by and I get stuck in the following boot loop. I'm able to cancel the auto boot by typing something random, but now it won't accept any commands.

Any help on what to do here?

U-Boot SPL 2018.09 (May 17 2022 - 01:17:57  0000)
Trying to boot from NAND

Initializing NMBM ...
Signature found at block 1023 [0x07fe0000]
First info table with writecount 0 found in block 960
Second info table with writecount 0 found in block 963
NMBM has been successfully attached

U-Boot 2018.09 (May 17 2022 - 01:17:57  0000)

CPU: MediaTek MT7621AT ver 1, eco 3
Clocks: CPU: 880MHz, DDR: 600MHz (1200MT/s), Bus: 220MHz, XTAL: 40MHz
Model: MediaTek MT7621 reference board (NAND)
DRAM: 256 MiB
NAND: 128 MiB

Initializing NMBM ...
Signature found at block 1023 [0x07fe0000]
First info table with writecount 0 found in block 960
Second info table with writecount 0 found in block 963
NMBM has been successfully attached

Loading Environment from NMBM... *** Warning - bad CRC, using default environment

In: uartlite0@1e000c00
Out: uartlite0@1e000c00
Err: uartlite0@1e000c00
Net:
Warning: eth@1e100000 (eth0) using random MAC address - 36:28:78:08:40:24
eth0: eth@1e100000
Reading from 0x7700000, size 0x20000
Succeeded
Zyxel version:V1.05
gpio: pin 24 (gpio 24) value is 0
gpio: pin 24 (gpio 24) value is 1
Hit any key to stop autoboot: 0
Loading FIT image at offset 0x180000 to memory 0x83000000, size 0x2ad7a4 ...
Automatic boot of image at addr 0x83000000 ...

Loading kernel from FIT Image at 83000000 ...
Using 'config-1' configuration
Trying 'kernel-1' kernel subimage
Description: MIPS OpenWrt Linux-5.15.134
Type: Kernel Image
Compression: lzma compressed
Data Start: 0x830000e4
Data Size: 2794332 Bytes = 2.7 MiB
Architecture: MIPS
OS: Linux
Load Address: 0x80001000
Entry Point: 0x80001000
Hash algo: crc32
Hash value: acc5387c
Hash algo: sha1
Hash value: 32aff5785944e5a2c718ee48ba1eb5cf63ead146
Verifying Hash Integrity ... crc32  sha1  OK

Loading fdt from FIT Image at 83000000 ...
Using 'config-1' configuration
Trying 'fdt-1' fdt subimage
Description: MIPS OpenWrt zyxel_nwa50ax device tree blob
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x832aa57c
Data Size: 11489 Bytes = 11.2 KiB
Architecture: MIPS
Hash algo: crc32
Hash value: a4107862
Hash algo: sha1
Hash value: 38e546a790a2be220e709e2d2260801ee547119d
Verifying Hash Integrity ... crc32  sha1  OK
Booting using the fdt blob at 0x832aa57c
Uncompressing Kernel Image ... OK
Loading Device Tree to 8fe67000, end 8fe6cce0 ... OK
[ 0.000000] Linux version 5.15.134 (builder@buildhost) (mipsel-openwrt-linux-musl-gcc (OpenWrt GCC 12.3.0 r23497-6637a f95aa) 12.3.0, GNU ld (GNU Binutils) 2.40.0) #0 SMP Mon Oct 9 21:45:35 2023
[ 0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[ 0.000000] printk: bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
[ 0.000000] MIPS: machine is ZyXEL NWA50AX
[ 3.161322] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 3.169571] Rebooting in 1 seconds..