Or add --show-all to see how CrossOver would fix it on your platform and others.
Normally this library is shipped together with the C library so to fix this issue you should refer to the Missing C library page.
Fedora 28 and greater is the exception though. So on Fedora you may try one of the commands below.
For 64-bit Windows applications Fedora >= 28 : dnf install --best libnsl.x86_64
cxfix --show-all may have more up-to-date fixes.
The commands usually also apply to newer versions of the distributions above as well as derived distributions. So for instance a fix for Debian 7 may still be valid for the latest Debian Testing and is typically also applicable to Ubuntu, Linux Mint, Deepin and Pop! OS. Similarly a fix for Fedora likely also works on Red Hat Enterprise Linux, CentOS, etc.
We're rebels. We're misfits. But mostly, we're software liberators. And we're very, very good at what we do. We have to be. Lots of developers work with open source, but only a tiny fraction of those are good enough to get software that was designed for one platform to work on another one. We invented CrossOver software - a unique approach to cross-platform compatibility that does not require dual-boot or another OS license. We launched PortJump to help app and game developers broaden their market beyond Windows® users. And we launched ExecMode to help organizations solve really ugly technical challenges.