Thanks for the answer!
After installing and running in the browser to start the wp installation, the 403 error appears!
I contacted my hosting and they told me that it is due to a .htaccess setup installed in the main domain that is causing the subdomain error. I found this very strange. So I did not want to temporarily disable .htaccess or the plugin to install wp in the subdomain, I think there should be another option.
Ps: I already checked all the permissions