You try to install Ubuntu in EFI mode, but you do not have an EFI System partition. If you have a Windows installed on the same disk, you should boot the installer in the BIOS legacy mode to get a working dualboot.
You try to install Ubuntu in EFI mode, but you do not have an EFI System partition.
If you have a Windows installed on the same disk, you should boot the installer in the BIOS legacy mode to get a working dualboot.