Cannot play European tournaments due to unclear events

We will not see Rubin Kazan at both European Cups competitions in the next two seasons, even if the club has earned the right to qualify for them. The decision was announced last Thursday when UEFA banned the Russian team from competing because of financial fair play rule. It is known that one club cannot participate if they are spending more than having profits, but here the (mysterious) organization is giving no clear information of why this has happened.