Everytime I go to the Nokia Store, try to install a app or search or my stuff I get this error;
"There was a problem opening this page. It could be a lost connection or a slow network. Check your connection or try again later."

Browser is working fine, restarted a few time, wifi and tmobile network any ideas?

I had a very similar problem for a few days, but when I rebooted and tried to download from the store immediately afterwards, the problem was gone.