F2P Player. As soon as the Tactical Challenge opened. I did my best to rise from Rank 15000 to Rank 249. Now, everytime I try to attack players of the higher ranks, I will receive a notice that says "Server Failed to Process Request", then will route me back to the title screen. I have high speed internet connection and the app in up-to-date in Play Store, so it is not on my end. Why? You don't want players that doesn't spend money to rise to the top ranks?