You are already running another Battlelog game, please exit this game first

Hello Jas0nWalker​,

I'm almost certain there’s no real way around this. I’ve been dealing with the same issue, just like many others throughout my 13 years of playing Battlefield 3. Sometimes simply closing Battlelog resolves it, while other times as you mentioned, I have to completely restart the EA app.

You could try using different browsers, in my case the issue tends to resolve itself over time.