Trying to open the store gives me an Error Code: 0
Can't look at the store with this error. I've checked the service status and it says that it's online. But I can't get into it
I've noticed this post gaining a small bit of traction. If it helps, I've noticed restarting the client fixes it in my case. Leaving the client open for long periods of time can cause this bug too in my experience. hope this helps, if not, I hope it get's fixed soon.