Thanks for your reply and sorry for not answering, I was just too busy.
I think some of the problems are actually my fault because I must have renamed some folders and moved them. Now everything works fine except Fadein, the software I use for work. It seems uninstalled and I can’t install it anymore. I had this problem before: Need help installing Fadein - #5 by NGr
Here is the output, maybe you can figure something out:
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0 squashfs 4.0 0 100% /var/lib/snapd/snap/kstars/46
loop1 squashfs 4.0 0 100% /var/lib/snapd/snap/gtk-common-themes/1514
loop2 squashfs 4.0 0 100% /var/lib/snapd/snap/todoist/9
loop3 squashfs 4.0 0 100% /var/lib/snapd/snap/slack/42
loop4 squashfs 4.0 0 100% /var/lib/snapd/snap/gnome-3-28-1804/161
loop5 squashfs 4.0 0 100% /var/lib/snapd/snap/todoist/5
loop6 squashfs 4.0 0 100% /var/lib/snapd/snap/gtk-common-themes/1515
loop7 squashfs 4.0 0 100% /var/lib/snapd/snap/core/11316
loop8 squashfs 4.0 0 100% /var/lib/snapd/snap/gtk2-common-themes/13
loop9 squashfs 4.0 0 100% /var/lib/snapd/snap/core18/1997
loop10 squashfs 4.0 0 100% /var/lib/snapd/snap/gnome-3-28-1804/145
loop11 squashfs 4.0 0 100% /var/lib/snapd/snap/kde-frameworks-5-core18/32
loop12 squashfs 4.0 0 100% /var/lib/snapd/snap/core/10958
loop13 squashfs 4.0 0 100% /var/lib/snapd/snap/core18/2074
loop14 squashfs 4.0 0 100% /var/lib/snapd/snap/snapd/12398
loop15 squashfs 4.0 0 100% /var/lib/snapd/snap/slack/38
loop16 squashfs 4.0 0 100% /var/lib/snapd/snap/snapd/11588
nvme0n1
├─nvme0n1p1 vfat FAT32 1FD1-269D 509.1M 0% /boot/efi
├─nvme0n1p2 ext4 1.0 5e2ea72b-43af-48e8-a0cf-55fd4d5e06a6 384.6G 9% /
└─nvme0n1p3 swap 1 e8d1bd05-8de4-4904-a6b7-476f61ded952 [SWAP]
etc/fstab: static file system information.**
Use ‘blkid’ to print the universally unique identifier for a device; this may**
be used with UUID= as a more robust way to name devices that works even if**
disks are added and removed. See fstab(5).
UUID=1FD1-269D /boot/efi vfat umask=0077 0 2
UUID=5e2ea72b-43af-48e8-a0cf-55fd4d5e06a6 / ext4 defaults,noatime 0 1
BootCurrent: 0002
Timeout: 0 seconds
BootOrder: 0002,0003,2001,2002,2003
Boot0002* Manjaro HD(1,GPT,15392f0a-686d-4a80-bf0c-9937b1398790,0x800,0x100000)/File(\EFI\Manjaro\grubx64.efi)
Boot0003* ubuntu HD(1,GPT,15392f0a-686d-4a80-bf0c-9937b1398790,0x800,0x100000)/File(\EFI\ubuntu\grubx64.efi)
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network RC