For what it's worth, I had this thing in my basket since 10-ish pacific, during all this time, i was stuck at the order checkout 'comfirm purchase' step.<p>In google fashion, it'd fail in very diverse ways:
1) mostly 'OR_PCVH_01' "unexpected error occured".
2) sometimes a troika of codes with the label "your purchase has expired". This would be ~5% of the time.
3) sometimes no error at all, just a blank page.<p>I was rather afraid to attempt going back to 'store.google.com' to checkout my cart again and find the items sold out, but I courageously overcame my fears and decided to stand up for myself. Consumer me went ahead, created a new tab, clicked the basket and pressed 'checkout'. And after the one or two 'OR_PCVH_01' and some blank page, boom, it went through.<p>Long story short, i suspect that error message 2 is misleading in what it means. It doesn't mean 'try to click this comfirm purchase' button later, it means try to "checkout your cart again".