I did try to do the hard daily challenges! The last challenge was break 20 lucky blocks in lucky islands as you can see in the screenshot. I did try to break 20 lucky blocks in solo first but it didn't work. I did try to break 20 lucky blocks in team lucky islands but it didn't work to. really weird! Is this because of the lucky block upgrade. I hope i can get my 160 points 150 exp and 1 cubelet for that challenge. I did put over the 2 hours in it!