SSL certificate problem: unable to get local issuer certificate error

Hi: Some users were trying to perform some git command activities (checkout, fetch, commit, etc...) by using the git. However, users received the following error: [COLOR=#222222][FONT=arial]fatal: unable to access '[U][url]https://github.com/git/myrepo.git[/url][/U][/FONT][/COLOR][COLOR=#222222][FONT=arial]': SSL certificate problem: unable to get local issuer certificate. On the other hand, they are able to access to their repositories via web browser. I was trying to solve applying this solution ([/FONT][/COLOR]http://blogs.msdn.com/b/phkelley/archive/2014/01/20/adding-a-corporate-or-self-signed-certificate-authority-to-git-exe-s-store.aspx[FONT=arial, sans-serif][COLOR=#222222]) with no avail.[/COLOR][/FONT] [FONT=arial, sans-serif][COLOR=#222222]​As a workaround, I was implementing the following command for those client: git config --global sslVerify false. But I fear about security. I want to know if any of you faced this error? Thanks[/COLOR][/FONT]