I'm unable to buy apps from the Play Store.
This is the message I get when trying to buy the app from a desktop computer :
(Click image to enlarge)
This is what I get when I try to purchase the app from my device (Nexus 5) : It's in French, in English :
Unable to process your order. please try again
I have already tried clearing the cache for the Play Store app on my device, cleared the cache on my browser on my desktop computer, and I tried 2 different credit cards (one Visa, one Mastercard, both working on Amazon).
I am able to download free apps, and was able to purchase apps from the Play Store in the past. My phone runs Android 5.1.1 and is not rooted.
Does anyone know what the problem could be or even where I could find more helpful error messages?