Hello,
I have shared a project via a public link for people who doesnt have an Asana account but they can’t access to the project with a classic browser (safari, chrome). Its just a feedback for the Product Team, I see that a lot asking for this but no answer so I tried again 
Welcome, @Halima1,
Have them try these troubleshooting steps, then please create a support ticket: see How to contact our Support Team.
Thanks,
Larry