As the title indicates I do the followng:

Click battle, then Arena and Defense the game [yes updated] freezes.  It freezes either immediately with the "add champ" buttons visible or I get the "add champ" buttons and the loading indicator - the end result is the same.  It freezes and I cannot set a defense/battle in the arena.

I have tried logging out and back in - I even briefly played a 2nd starter account through the intro prior to logging back into my account.  I have set Bluestacks to use:

OpenGL, DIrectX and various "predefined profiles" (ex. Samsung Galaxy S8 Plus).