SSAS MD Direct query Data Source Error - Couldn't load the model schema associated with this report

[CBI_Geral]

I'm having a problem connecting to a SSAS Cube through the Enterprise Gateway.
This is my configuration:
-Windows Server 2008 R2
-SqlServer 2014 SP1 CU7
-Active Directory on-premise
-Power BI Enterprise Gateway installed on the same machine

This is what happens:
-I can connect to the SSAS cube from Excel
-I can connect to the gateway from Power BI service
-I can create a Data Source pointing to the on-premise SSAS cube (I've mapped the online user with a local user whit accessing rights to te cube)

The problem is:
Couldn't load the model schema associated with this report. Make sure you have a connection to the server, and try again.
Please try again later or contact support. If you contact support, please provide these details.

Activity IDba4313f9-5bf6-4b7d-b735-c21e00378632
Request ID6fb92e81-0661-dfdb-cb44-7ab30d59ff66
Correlation IDc14f9b70-14f1-3654-d8c7-ea3c55358694
TimeThu Nov 24 2016 09:37:04 GMT+0000 (GMT Standard Time)
Version13.0.1700.679

[v-haibl-msft]

@CBI_Geral

Have you tested the mapping rule in “Map user names”? It seems that the user mapping is not working as expected. Please refer to this document.

Best Regards,

Herbert