I've seen this error a few times just now, it seems to only occur when I install an app through the Google Play web interface. Haven't seen it when installing apps directly from my mobile device. Device is quite new and has more than enough free disk space.
Couldn't find anything on here yet about this specific error. After a retry it downloads without any problems, so while it is far from blocking, I do hope to get some insight on what is happening here.
StackExchange only lists error 923 as an
AndroidRuntime(923) error, but I don't see how that can be the cause here.
Screenshot attached with error in Dutch.
Error - 'Game' could not be downloaded due to an error. (923)