If you're seeing a blank white screen when you access your Contact Reach Whitelabel/CNAME URL, most likely you have missed the directory or extension "/app/login" after . So for example, if your CNAME or Whitelabel domain is app.mydomain.co, you should enter app.mydomain.co/app/login. In saying all these, you must've already followed the correct procedures in setting up the CNAME/Whitelabel domain. Here's the tutorial video: http://link.mylocalagency.co/cr-cname