Add SSAS gateway enterprise: UnknownError when adding data source

[OneWithQuestion]

I was able to add a data source yesterday to an SSAS Tabular 2014 data model without issue.

Now today I came back to add another tabular model and I keep getting this error:

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Unable to connect: We encountered an error while trying to connect to MyServerName\Tabular. Details: "An unknown error has occurred. Please try again. If the issue continues, please contact support."Hide details

Activity ID:	3b9799fc-2c5b-4f5a-ba76-eb93a77ae96b
Request ID:	576a289f-5cd9-1bbe-f55b-9f131e9d1e39
Cluster URI:	https://wabi-us-north-central-redirect.analysis.windows.net
Status code:	400
Error Code:	UnknownError
Time:	Thu Apr 28 2016 09:40:40 GMT-0500 (Central Daylight Time)
Version:	13.0.1100.466

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Suggestions?

Nothing on the server hosting the data gateway for error messages. 

[Greg_Deckler]

I would contact support, support.powerbi.com Contact Support link.

[dimazaid]

@OneWithQuestion were you able to resolve this issue?