TypeError: 'NoneType' object is not subscriptable while installing

[jacekkowalczyk82]

Executing ==> 7z -ssc- x -y "/home/kowalczy/Downloads/elementaryos-5.1-stable.20200501.iso" -o"/root/.multibootusb/iso_cfg_ext_dir" ".cfg" -r 2> /dev/null Executing ==> 7z -ssc- x -y "/home/kowalczy/Downloads/elementaryos-5.1-stable.20200501.iso" -o"/root/.multibootusb/iso_cfg_ext_dir" ".txt" -r 2> /dev/null Executing ==> 7z -ssc- x -y "/home/kowalczy/Downloads/elementaryos-5.1-stable.20200501.iso" -o"/root/.multibootusb/iso_cfg_ext_dir" "isolinux.bin" -r 2> /dev/null Executing ==> 7z -ssc- x -y "/home/kowalczy/Downloads/elementaryos-5.1-stable.20200501.iso" -o"/root/.multibootusb/iso_cfg_ext_dir" ".lst" -r 2> /dev/null Persistence option is available. Persistence Max Size: 4.0G MultiBoot Install: USB Disk: /dev/sda1 MultiBoot Install: USB Label: KINGSTON MultiBoot Install: USB UUID: 4150-6131 MultiBoot Install: USB mount path: /media/root/KINGSTON MultiBoot Install: Disk total size: 14.4G MultiBoot Install: Disk used size: 9.8M MultiBoot Install: Disk free size: 14.4G MultiBoot Install: Filesystem: vfat MultiBoot Install: Disk vendor: Kingston MultiBoot Install: Disk model: DataTraveler_3.0 MultiBoot Install: ISO file: elementaryos-5.1-stable.20200501.iso MultiBoot Install: Distro type detected: ubuntu Persistence chosen is 0B multibootusb directory already exists. Not copying. EFI/BOOT directory does not exist. Creating new. Copying EFI directory to /media/root/KINGSTON Installing elementaryos-5.1-stable.20200501.iso on /media/root/KINGSTON/multibootusb/elementaryos-5.1-stable.20200501 Executing ==> 7z -ssc- x -y -o"/media/root/KINGSTON/multibootusb/elementaryos-5.1-stable.20200501" "/home/kowalczy/Downloads/elementaryos-5.1-stable.20200501.iso" 2> /dev/null ISO extracted successfully. Sync is in progress...###################### | Distro extraction completed... fdisk: cannot open /dev/sda: No such device or address ERROR: fdisk failed on disk/partition (/dev/sda1) Traceback (most recent call last): File "/usr/lib/python3/dist-packages/scripts/mbusb_gui.py", line 348, in install_syslinux syslinux_distro_dir(config.usb_disk, config.image_path, config.distro) File "/usr/lib/python3/dist-packages/scripts/syslinux.py", line 200, in syslinux_distro_dir usb_fs = usb_details['file_system'] TypeError: 'NoneType' object is not subscriptable