[Samsung Galaxy A32 4G] LuCeiFeR:
I already have TWRP on my A32 and have Magisk. Followed the guide, unfortunately phone didn't boot up. Instead it reboots to recovery. The hereunder error appears while flashing.

PARTITIONS FLASHER
| Released at 2021, January 10
| Developed by ChonDoe

Archive: /external_sd/ChonDoe_Flasher.zip
inflating: /tmp/busybox-arm
Archive: /external_sd/ChonDoe_Flasher.zip
inflating: /tmp/e2fsck
Archive: /external_sd/ChonDoe_Flasher.zip
inflating: /tmp/installer.sh
Archive: /external_sd/ChonDoe_Flasher.zip
inflating: /tmp/resize2fs
ENVIRONMENT SETUP
| Unmount System
umount: can't unmount /system: Invalid argument
umount: can't unmount /system_root: Invalid argument
umount: can't unmount /system_ext: No such file or directory
umount: can't unmount /product: Invalid argument
umount: can't unmount /vendor: Invalid argument
| Detecting Partition Layout
| Dynamic partition detected
| System Block: /dev/block/dm-0
| Product Block: /dev/block/dm-2
| Vendor Block: /dev/block/dm-1

FLASHING SYSTEM IMAGE
Invalid sparse file format at header magic
Failed to read sparse file
703357+0 records in
703357+0 records out
2880950272 bytes (2.7GB) copied, 34.579540 seconds, 79.5MB/s
| System flashed as raw image
| Attempt to Resize Partition
e2fsck 1.45.6 (20-Mar-2020)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 3A: Optimizing directories
Pass 4: Checking reference counts
Pass 5: Checking group summary information

/: ***** FILE SYSTEM WAS MODIFIED *****
/: 7386/7744 files (12.1% non-contiguous), 684040/692238 blocks
resize2fs 1.45.6 (20-Mar-2020)
Resizing the filesystem on /dev/block/dm-0 to 1217099 (4k) blocks.
The filesystem on /dev/block/dm-0 is now 1217099 (4k) blocks long.

| Done

FLASHING PRODUCT IMAGE
| Cant find product.img

FLASHING VENDOR IMAGE
| Vendor flashed as sparse image
| Attempt to Resize Partition
e2fsck 1.45.6 (20-Mar-2020)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Padding at end of inode bitmap is not set. Fix? yes

/dev/block/dm-1: ***** FILE SYSTEM WAS MODIFIED *****
/dev/block/dm-1: 1140/41760 files (0.0% non-contiguous), 124955/166988 blocks
resize2fs 1.45.6 (20-Mar-2020)
Resizing the filesystem on /dev/block/dm-1 to 185664 (4k) blocks.
The filesystem on /dev/block/dm-1 is now 185664 (4k) blocks long.

| Done
I:TWFunc::Set_Brightness: Setting brightness control to 5
| Enjoy

I:Updater process ended with RC=0
I:Install took 59 second(s).
E:Unable to unlock /dev/block/mmcblk0p42 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p14 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p18 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p8 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p11 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p4 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p15 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0boot0 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p5 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p7 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p13 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p10 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p12 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p9 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0 for flashing: (null)
E:Unable to unlock /dev/block/mmcblk0p6 for flashing: (null)
Updating partition details...
I:checking for twrp app
I:Data backup size is 0MB, free: 108145MB.
...done
I:Set page: 'flash_done'
I:TWFunc::Set_Brightness: Setting brightness control to 200
I:operation_end - status=0
I:TWFunc::Set_Brightness: Setting brightness control to 5
I:TWFunc::Set_Brightness: Setting brightness control to 0
I:TWFunc::Set_Brightness: Setting brightness control to 200
I:Set overlay: ''
I:Set page: 'clear_vars'
I:Set page: 'install'
I:Set page: 'main'
I:Set page: 'clear_vars'
I:Set page: 'main2'
I:Set page: 'advanced'
I:Set page: 'copylog'
I:Set page: 'action_page'
I:operation_start: 'Copy Log'