Store is broken.
I cannot buy a "Heart Refill" or a "Double or Nothing". I have plenty of lingots. I am running Firefox on CentOS, and am up to date. the store used to work. Anyone else have problems with the store?
Thank you for checking. I was able to use it on Saturday, which is why I now have the 'Heart Refill' and 'Double or Nothing'. Next time I am ready to purchase something in the store, I will compare different platforms and browsers to see if that is the problem. I haven't had any other issues with Duolingo, and I have learned a lot.