I am having the same issues. upon googling, all it says its under maintenance (idk why it would be) or that its because the server is overloaded. but please let me know if u find anthing.

texansky Kora_Vegeta  It's not working for me either.  I'll escalate it now, but unless this is a just a temporary glitch, there might not be a fix until Monday.

texansky  Kora_Vegeta  The Store seems to be working again.  Let me know if you run into any more trouble with the site.