For the first time ever have I tried battling on my mobile, since all 3 boss times are no good for me this time. Being on a 3 hour public transport ride, I thought I'd go through the mobile ordeal and try my best to participate. However, each and every time (in spite of refreshing, reloading, etc.) instead of taking me into battle I got the error message about it seeming to not having chosen any weapons. No way I could fight.

I need to mention, though, that I kind of regularly do get this error on my computer at least once every day during my BQs. But then I sniff and just go back and enter battle anew and it works.