Case: It happens sometimes. After reloading it's not showing, sometimes 2-3 times reload not showing. Getting the error 2-5 times in weeks. I think: You dhru always checking license file or authenticate from dhru server. Like my previous experience, i was unable to access for 20-30 minutes, then i have checked cp.dhru.com, that's down, means cp.dhru.com is down and admin cannot log in rather it's asking to provide a license key. But why? If you authenticate license validation, you have to check the validation every 15 days / 30 days, not concurrent. It's trouble, it's a global issue as all server same system.