Yes, you can but you need to setup your whmcs domain in your hosts file.
If you use "localhost" as your domain, your license will be suspended automatically by our Licensing System.
- Edit your hosts file
- Add the following line:
x.x.x.x domain.tld
x.x.x.x www.domain.tld
x.x.x.x is your local ip and domain.tld your WHMCS domain