Prior to update a boost would cost coins NOT 40 Gems! Why the change or am I,missing something.
Do you have less than 800 Coins? If there's not enough Coins available, you'll be offered the chance to buy Boosts with Gems.
I posted about this last week. I have PLENTY of coins and PLENTY of gems but the fact we now have to pay gems instead of coins has literally made me walk away from the game. The update is horrible and the lack of support is worse. I was never responded to by developer's in previous post. They have been quick to respond in the past.