Ah sorry, that’s on the first level but it’s only created in installation - that’s why you don’t have it yet.
Then I would say the problem is likely in your .htaccess file, or in some DNS configuration with your hosting… you need to find out who is causing that redirect, and removing it.
Thanks again for this. In fact I solve this issue. Tha fact was that I installed it on my webserver in a sub folder with a CMS in front. it was redirecting to the core folder from my CMS. I needed to push this CMS in another folder and having SuiteCRM as a root. This is not solving at all as I will not want it as root but it permit for the moment to test it.