I have an updated apk - tested successfully on various devices and simulator instances - with the following manifest:
i have problems too with the publisher page
...The server could not process your apk file ...
In the app overview it says (in red) that there is a draft of the new version but in "APK-Files" tab the new version does not show up.
From time to time the app does not show up in the app overview at all.
Update: the problems i experienced where solved the next day.