It may happen that you 'skip' over the daily reward by having
multiple tabs of PH open or refreshing multiple times. The reward
window only pops up 1 time, if you immediately refresh the page
again it disappears. But you still should get the rewards from
it.
Can you check the bank (click on your PD/Nuggets in the Userbar at
the top) to see if you actually got the rewards?
In case of emergency Plushie