App Center doesnt load for me either on 5.0. I dont care though because it is pretty much useless now that blackberry AppWorld was released. dL it from your device at BlackBerry App World
I have a Tour with the .230/.238 hybrid and I get the same error. I was hoping it wouldn't affect you on the Storm, but I'm thinking it is. What did you need from the app center? I can see if you can get it a different way.