@Nick,

I deleted the symbolic links and was able to recreate this via a very long way.

Due to the fact that bash was working anymore I needed an alternative to create this symbolic link. I found the sash executable (https://altlinux.pkgs.org/p10/classic-x86_64/sash-3.4-alt2.qa2.x86_64.rpm.html), which I was able to extract and make it executable.

Due to the fact that my flexshares were still up and running I was able to get this executable in my platform without shutting down. Meanwhile my only ssh terminal session was still working although I could have done this also via my local terminal access.
Still had to find out how to deal with the sash commands but in the end I was able to copy sash to my root and use it there to re-create the symbolic links lib->/usr/lib and lib64->/usr/lib64.

That made my day ! Finally can access everything again.

Hopefully this method can help someone else that makes the same mistake ;-)