I used "NW04 SP16 sneakpreview".
Error: 'undefined' is null or not an object
Url: (very long url)
I thought it had something to do with the errormsg that I received about the encryption config failure (see below) so I executed sap note 796540:
If you installed the J2EE Engine with "weak encryption", the most probable cause for problems with user mapping is incorrect configuration. To resolve this, set the UME property "ume.usermapping.unsecure" to "TRUE", restart the J2EE server, and try again.
But this dit not the trick unfortunantly.
I also checked for permissions for my Admin but he has Super_Admin so that should be ok to I think.
Perhaps it has something to do with not having a System Landscape defined but how can I do this?
Or is it something else that I have overseen? Perhaps installing a license? (which I did not do yet)
Thank you for your assistance.
PS if you need more info I'll provide it for you.