For some reason I encountered some unusual situation here like, the daily reward seems not showing every time I logged in. Here's the possible reason behind that.

1. You usually don't turn off your computer

2. You are not logging out your account

3. You just closed your browser

4. You don't close your browser and remain logged in

 

Solution:

1. Clear cache of your browser

2. Restart your computer

 

Disclaimer:

The problem and solution above is based on my experience and may not actually be the same problem as yours, encountering same problem and doing this solution may not guarantee a proper solution.