Unable to download anything from asset-store

[EDIT]
This thread solved my problem:
https://forum.unity.com/threads/issues-with-unity-hub-on-fedora-30.767687/

sudo ln -s /var/lib/ca-certificates/ca-bundle.pem /etc/ssl/certs/ca-certificates.crt

made it work.

On other distros it was:
sudo ln -s /etc/ssl/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt
or
sudo ln -s /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem /etc/ssl/certs/ca-certificates.crt

[Original Post]
Hello everyone.

I had a lot of Unities (i think since 5.x) installed on Linux.
Now I completely freshed-up my system:
installed openSuse 15.1
the Unity 2019.3.3.f1 (via UnityHub).

Unity itself works fine.

However i am able to enter the asset-store (in Editor) clicking on "download" but download starts and then stucks at 0%.

I found a lot of posts with people having the same problem on different OS.
Tried some solutions I found (firewalls, Ports to open...) but for me nothing works.

So i deinstalled the current version and downgraded to an older one, but still not able to download any of the assets in store (no matter if "free" assets, or assets I bought in past).
I also deleted the Unity-config files under "~/.config/unity3d" and ~/.local/share/unity3d.
I think it is not a "Unity"-Bug but maybe I find someone here having the same problem and hopefully knows how to solve it.

If you need any more information I will post it.

Thanks in advance, Chris.