Flatpak got to little disk space (noob)

Hey there, i’m pretty new to linux (am on elementaryos atm).
so anyways, i tried installing discord.
The problem i ran into is:

Error: Not enough disk space to complete this operation
error: Failed to install com.discordapp.Discord: While pulling app/com.discordapp.Discord/x86_64/stable from remote flathub: Writing content object: min-free-space-size 500MB would be exceeded, at least 115,2 MB requested

Thing is, i checked my Disks, and i have more than 115,2 MB on every single one of them.
on some i do have little, but definetly more than 100 MBs.
I don’t really have any clue what this could be so yeah, looking forward to your guys responses. ^^
have a good one, cheers.

Not all disks will be considered: Flatpak installs into /var/lib/flatpak (with --system) or $HOME/.var (with --user).

min-free-space-size 500MB would be exceeded, at least 115,2 MB requested

It sounds like you system is set up to require at least 500MB of free space (on the disk that contains the installation location). That means in order to have 115,2MB at disposition, you need at least 615,2MB of free space.