Unable to boot because "Some operations may be unavailable"

So I installed OpenSuse Tumbleweed and I love it, it looks great and feels great. So I install it alongside my Ubuntu 18.04, Ubuntu being my primary OS, and Suse being my work OS. So naturally I have a lot of files I would like to rescue. So I thought the problem was with my boot-loader, as Suse didn’t show up in my boot and it would just boot into Ubuntu without even showing the boot-loader so trying to follow the instructions Here I got to a problem Here, the problem being that doing
tux > sudo mount -t proc none /mnt/proc
gave me the error:
~$ mount: /mnt/proc: mount point does not exist.

[FONT=arial]So after realizing it was a problem with Suse and not the bootloader I gave up because I’m a Suse noob and 2 hours of Google-ing left me hopeless,
So I go to Gparted to clear my partition and try to re-install Suse and hopefully not mess it up this time. I noticed that there was a flag next to my partitions
that contained Suse, When I right clicked and clicked on "information I got this:

[/FONT]Unable to read the contents of this file system!
Because of this some operations may be unavailable.
The cause might be a missing software package.
The following list of software packages is required for xfs file system support: xfsprogs, xfsdump.

And:

Unable to read the contents of this file system!
Because of this some operations may be unavailable.
The cause might be a missing software package.
The following list of software packages is required for btrfs file system support: btrfs-progs / btrfs-tools.

[FONT=arial]Please help me fix these errors, I have no clue on how I could possibly do this, as I’ve never had to really deal with partition problems, and I really
[/FONT]need my work files. If there is no way to fix it, is there at least a way to rescue my files?

I’m not completely sure what you are trying to do there.

The booting problem: You weren’t completely clear, but my guess is that you are using Ubuntu to handle the booting. The version of grub and os-prober from Ubuntu probably does not properly deal with “btrfs” file systems. If you want to keep Ubuntu as your primary system, you might do better to reinstall Tumbleweed, but use “ext4” for the root file system (instead of “btrfs”).

Mounting problem: If “/mnt/proc” does not exist, of course you should expect that error. Perhaps you are trying to do a rescue mount. But then you need to mount the Tumbleweed root file system first (which should result in their being a directory “/mnt/proc” (assuming that you mount at “/mnt”). But you probably also need to mount the “btrfs” subvolumes at their appropriate places.

I am sorry but your post just does not make any sense.

Please post in chronological order exactly what you did and why. Where possible copy-paste any commands and the consequent output.

How do you conclude that openSUSE Tumbleweed is “great” if it does not boot?
Were you trying to mount/examine a Btrfs filesystem from a system that did not have the Btrfs tools installed?
What files do you want to “rescue”? Where from and where to?
Why were you trying to mount /proc in /mnt?

This might be a painful lesson. Never install a new OS or adjust partitions, unless existing important files on the PC are backed up.

Are you trying to recover files from the Ubuntu partition? Did you share a /home or /root partition between the two installations?

If you succeeded to “clear” your openSUSE / partition, and the files you want to rescue were there, they were there, but not any more after “clearing”. Same would apply to a separate /home if you also cleared it.

There is no need to “clear” any partition when you install. The installer will do that for you should that be what you really want. I agree with nrickert that you probably would do well to choose EXT4 for your new TW installation.