Hello,
I have copied the installation files to the server.
I started the installation by entering the url followed by / install, as described in the installation instructions.
When I run this installation page, a 403 error appears telling me that I do not have permission to launch the page.
Forbidden
You don't have permission to access /installer on this server.
I do not understand.
Thank you for your help
Check what user own the folder and make sure the webserver can access the folder.