An initial step of the reseller wizard is missing the possibility to setup domain:
Documentation shows that there shall be option to setup a domain.
Missing option means lack of the resources for domain configuring.
To configure brand on URLs like domain.tld/cp and domain.tld/store you should have domain.tld domain added to POA with webhosting configured for the domain on Exclusive IP address and have 1 free unit of the resource Branding access point.
To configure brand on URLs like cp.domain.tld and shop.domain.tld you should have domain.tld domain added to POA with webhosting configured for the domain on Exclusive IP address also you need at least 2 free units of the resources Hosting (Apache or IIS), Branding access point, IP Addresses and IP based virtual host (2 items of each of the resources listed must be available).
If there is enough available resources the wizard will look like below: