OData error with Dynamics NAV Content Pack

[cosmoaull]

Hallo,

I have published my Windows Azure Dynamics NAV Server OData Feed und get Data in Excel und Power BI Desktop. I have installed the DataGateway on my Azure Server und now this Error will come back:

Aktivitäts-ID:	dcc7ab8a-a6f0-3205-e393-dd6ab1400518
Anforderungs-ID:	1940ddff-7dab-9dcc-e247-40a189854cab
Statuscode:	400
Uhrzeit:	Tue Nov 10 2015 14:03:16 GMT+0100 (Mitteleuropäische Zeit)
Version:	11.0.9168.604
Cluster-URI:	https://wabi-north-europe-redirect.analysis.windows.net
Details:	Failed to connect to a database. Error message: Error occurred while decoding OAEP padding.

Who could help?