Help Storage can't mount because it's encrypted

[needsalami]

Deciding to remove root access from my phone, i have uninstalled the magisk app. Everything would have gone smoothly if only I had removed my pin(screen lock) before removing the magisk. Now i get the error "failed to decrypt your device" on startup. It tells me to have a factory reset but I cannot do that since its not possible for my OS to mount the storage. I have access to TWRP but nothing else at the moment.

I don't have access to file manager so I can't delete the password files from data. I need to get pass encyption error screen to enter my password but cannot, without decrypting the storage. Is there anything I can for my phone to mount the storage?

 

[needsalami]

In the terminal emulator, I tried "twrp decrypt xyz" code but got the error "Failed to decrypt data".

 

[MrJavi]

Flash a backup from TWRP, reboot and remove pin lock.