Since the update, the "Request Stamina" button is missing.
It mentions how you CAN request stamina, and that you can get up to 2 per day from friends, but the only option available is to buy a stamina refill for 10 gems.
Please restore this option as soon as possible, as it helps us greatly.
Also, please stop/fix the 25-request limit. Nothing is more frustrating than when you have stamina saved up to do dungeons, then due to friends requesting or sending gifts, all the stamina gets wiped out.
Thank you!

Reported as well
Quick solution for now is asking from Fb . the option is still there

and if you have no pc access you can still access it on mobile using browser that support flash player like puffin , it is amazing

another thought maybe cause we asked recently for stamina we donnt have the option and if we waited 12 hour the option will appear again . so maybe this to prevent spamming requesting

It is a bug - confirmed -- Sp working on a fix right now

I'm playing ML on my smart phone and iPad and I still can't send "stamina requests" to my friends