Both fail. The road via AppEngine fails with an unknown reason. The message is "Er is een fout opgetreden tijdens het installeren van deze applicatie. Probeer het later opnieuw." (Dutch), which rougly translates to an error has occured, please try again later.
Trying via Google Apps control panel results in "U beschikt niet over de benodigde rechten om deze applicatie te installeren." (Dutch), which translates to "you don't have enough rights", probably also the problem via the other way.
Which rights is the error talking about, what am I doing wrong?
Thanks.
Jeroen