Originally Posted by maotd

Nope. The normal bonus stages spawn after a mission. I got one, go right after the mission and it has only 10s timer. Obviously I missed it. And game crashed when I tried to sell le 2* got from the missions with another error:null.

What browser are you using and did you clear your cache after the maintenance? I had no problems doing the bonus stages (done 25, 50 and 80 Stamina ones) since the maintenance.