Hello, please try refreshing and clearing cache, see if that then allows you to collect this reward. How far offset from the server's time zone are you? Was it already the 6th for both you and the server time?

If you have not gotten your rewards, and are still unable to collect by the end of the day, please create a CS ticket and they will be able to best help you.

https://support-center.oasgames.com/