Hi Anders,
while I can't help you with the mode=admin problem (this has never worked for me), I can help you build your custom FLP on the Dev Edition of HANA. I do this from HANA Studio/Eclipse. Assuming you've done all these things via. HANA Studio/Eclipse:
- created AppWidgets (tile catalog) and associated xsprivileges (WidgetAccess:<Catalog_name>)
- created AppSite (FLP) and added tiles and associated xsprivileges (AppSiteAccess:<App_name>)
- create a role to access both of these artifacts
- performed AppSite role assignment (assigning tiles and groups)
- assigned roles to user that can access the FLP site
Phew, an exhaustive list, I must say. So, assuming these are all done, the new AppSite you've created is then accessed from the URL:
http(s)://server.domain.tld/sap/hana/uis/clients/ushell-app/shells/fiori/FioriLaunchpad.html?siteId=the|path|to|your|site
I had been making the mistake of using a relative path in the siteId, like the/path/to/your/site, which never worked. Then it clicked: the Cockpit Admin site is reference like so...
siteId=sap|hana|admin|cockpit|cockpit
So it should follow that my site is accessed in the same way...
siteId=the|path|to|my|site
Bingo. No more "Unable to load groups" error. In any case, even if it doesn't help you, it may help someone else.
All the best,
Hagen