I have the same problem, I see no results after battle, and if I try afterwards I just get "not available" popup. Did the bug report procedure according to Aslain.
Aslains_WoWs_Logs.zip
When getting grand battle instant crash. repeated 3 times. Sry did not get any other info.
Error said something about xvm data, sry I should have taken a screenshot, but didn't... :(