The partition table on my machine is MBR and it looks like this:
sda4 (extended)
-sda5 - 1000MB /boot
for Ubuntu Desktop 18.04 - ext4
-sda6 - 1000MB not used - ext4
-sda7 - 1000MB not used - ext4
-sda8 - 30GB /
for Ubuntu 18.04 Desktop - ext4
-sda9 - 30GB not used - ext4
-sda10 - 30GB not used - ext4
-sda11 - 12GB swap
-sda12 - 700GB /home
- ext4
As you can see I have already successfully installed Ubuntu 18.04 Desktop. Partitions were made with GParted when installing Ubuntu 18.04 from a live USB. When I try to install Ubuntu Server 18.04, at the stage of selecting partitions, when I select the 9th partition, the installation process crashes every time.
This is how the report looks :