Segmentation fault (core dumped)

when install Nodejs, and run "node -v" i get this error "Segmentation fault"

when I try to install a new package with "npm" I got this error too "Segmentation fault (core dumped)"

I've tried most of the helps I've found the internent.. but nothing works.
Is there any best solution you may give me...?

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ns2 (not installed)
ProcVersionSignature: Ubuntu 5.3.0-46.38~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-46-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon May 18 20:01:06 2020
InstallationDate: Installed on 2019-06-22 (330 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: ns2
UpgradeStatus: No upgrade log present (probably fresh install)