My device is encrypted so I have done following steps:
- In TWRP: Wipe -> Format Data
- Reboot back into recovery but fastboot was not working so reboot to fastboot mode
- Flash Rom: The ROM I have has flash-all.bat file which run `fastboot -w update images.zip` command and reboot the device into system after flashing all image files in images.zip.
- Reboot the device into recovery
- Flash twrp.img
- adb sideload twrp.zip and reboot to recover again
- adb sideload Magisk-v19.0.zip and reboot to recover again
- adb sideload Disable_Dm-Verity_ForceEncrypt_08.18.2019.zip and reboot to system