I've been playing for about a week on and off, I have not had the issue you are having. Maybe the people you are challenging just don't want to fight you? Try fighting NPCs
I figured out what the problem was. I believe I had an intermittent disconnect, and although the game reconnected to the backend servers, I couldn't get my battles going. So I just reloaded the page and it worked.
Comments
I've been playing for about a week on and off, I have not had the issue you are having. Maybe the people you are challenging just don't want to fight you? Try fighting NPCs
I figured out what the problem was. I believe I had an intermittent disconnect, and although the game reconnected to the backend servers, I couldn't get my battles going. So I just reloaded the page and it worked.