Having trouble accessing certain paid apps or seeing errors when browsing for apps in general on your Google Play account? No, you’re not crazy— and you’re not alone either. There have been reports for the last few days highlighting paid apps are not showing up on either a device or even on the web, in addition to the dreaded RPC (Remote Procedure Call) message also. While all paid apps are most likely safe and sound even despite this major glitch, it is a nuissance nevertheless. Hopefully Google gets this kink worked out sooner than later.
source: XDA Forums