Who helps me solve this?

Hello, 

I don't know what system you're using that is giving that error, but the only way to "correct" this is to set up a 301 redirect to have the non-www version forward to the www version, or vice versa. This is not a function we have available through Homestead, so I would recommend that you create a free account through Cloudflare, point your domain to Cloudflare via nameservers so that your DNS is hosted through them, then set up that 301 redirect. You should be able to find instructions on how to do this via Google.