Filevault Decryption error: Mac keeps rebooting when plugged in.

I just made a dumb mistake by turning off filevault. [Problem]: It made my Mac kept restarting/rebooting itself, when I plug the power adapter. The filevault said I had to connect to a power adapter to continue decrypting; but when I try to plug it in, it shuts off then displays an error message (provided below), and it will reboot foreverunless you plug it off. Does anyone knows how to fix this? Why I couldn't fix it? Why this happened: My keyboard wasn't responding, and there were some tutorials that I tried and made me disabled filevault. What I tried: 1. I've tried (sudo) fdesetup disable, but I couldn't resolve it and just says: Filevault was not disabled (2). (idk what's the problem) 2. I tried going on MacOS Recovery: terminal such as unlocking the vaults, diskutil apfs unlockVault / decryptVolume..., and the fdesetup doesn't work on recovery terminal; also tried usr/libexec/-whatever-that-is (didn't know what to do with the drive tho.). 3. I tried resetting NVDRAM and SMC, still didn't change. 4. I've tried doing it in safe mode, but it still reboots. The last method i don't wanna try: Resetting my Mac or fixing it to an expert; there are important files I want to keep and I'm broke. What I might do now is using my Mac unplugged, which is pretty inconvenient. I got a feeling if I leave this be my files are gonna get corrupted. I hope someone can resolve this, I have yet to find any working solutions that others are having similar problems such as this. I use MacBook Air (early 2015) [Intel]. Version MacOS 12.7.6