No Fiori Launchpad Logon Screen

Hello Fiori experts,

There are a lot of topics regarding the Fiori Launchpad Screen on SCN, but in my opinion i have an issue which is not covered so far.

So coming to my problem. I have followed all configuration steps on help.sap.com for configuring the fiori launchpad.Unfortunately, wenn i call the fiori launchpad i get the following authorization request (sorry it is in German):

Once i give in my credentials i see my Launchpad (at the moment empty, as it is not configured).

The Launchpad Designer Logon Screen is working perfectly, so i see the typical standard fiori logon page.

In TX sicf i have maintained the Custom Logon Page Implementation class:

I have cleared the following caches:

• Browser cache
• SMICM
• /IWBEP/CACHE_CLEANUP
• /IWFND/CACHE_CLEANUP

I hope someone can help,

Thanks,

Wladimir