I’ve got a digital membership and I went to buy a bundle but it says I have to upgrade my membership. Yet the site freezes and won’t run the payment.
i think the bundle is sold out. 
The t-shirt bundle does appear to be sold out, the long sleeve one is not, but that message about upgrading you membership shouldn’t be coming up because of that. Are you sure your membership isn’t expired or that you are for sure logged in? You can be logged into the forum and be logged out from the rest of the site
I got on again today and it still says to upgrade my membership although I’m already at the required tier. I’ll give it another day and see what it says.