The inability to open the Game or Cashier can be caused by your Chrome browser blocking third-party cookies. To resolve the issue please follow these steps:
Desktop
1. Go to Settings
2. Search for "cookies"
3. Make sure that "Block third-party cookies" is disabled.
Mobile
1. Go to Settings
2. Click on "Site Settings"
3. Click on "Cookies"
4. Make sure that "Block third-party cookies" is disabled.