I heard it's not just me but I wanted to make a thread about this bug. The training page is blank but I can battle.

I've been getting a blank page (within sidebar and header, whenever I try to put a Pet back into training, but the chosen stat is not available in reality.
Basically that should not be an option on the new page that opens after having ended a session, but obviously it is. Once refreshed, the "wrong" stat no longer shows as available and the pet can successfully be put into training for a different one. The next (before empty) page gives the option to set alert or simply go back to training center.
Positive part: no sP charged/lost for the wrong try.
I have the new training center in Old Subeta. I can't put any of pets back in training, I get a blank page with the battle related links header. I know you are excited that you can edit old Subeta but maybe fix some of the new stuff before pushing out even more stuff.
Using Edge app for Android. [Edit]Now it's working.