[fChk]

(...)

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Processor  : Intel Xeon E312xx (Sandy Bridge, IBRS update)
CPU cores  : 2 @ 2499.998 MHz
AES-NI     : ✔ Enabled
VM-x/AMD-V : ❌ Disabled
RAM        : 7.8 GiB
Swap       : 32.0 MiB
Disk       : 4.8 GiB

The code above tells us that you only have 4.8 GiB!! I took a quick look at the code and it's:

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# total disk size is calculated by adding all partitions of the types listed below (after the -t flags)
TOTAL_DISK=$(df -t simfs -t ext2 -t ext3 -t ext4 -t btrfs -t xfs -t vfat -t ntfs -t swap --total -h | grep total | awk '{ print $2 }')
echo -e "Disk       : $TOTAL_DISK"

So just to make sure of this, can you please post the output of these two commands run as root:

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lsblk

and

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df -Th

thanks!