Here is my error screenshot.
I do have the correct version of oracle client installed, I can connect to the db using SQL developer as well.
Unable to connect: We encountered an error while trying to connect to CDS01_12c_DEV.world. Details: "Cannot connect to the mashup data source. See error details for more information."Hide details
Activity ID: 5d04c3bb-d937-4973-8b63-7fd82c0562ef
Request ID: 4fc49ee5-0cef-cee8-087b-5b534683b251
Cluster URI: https://wabi-canada-central-redirect.analysis.windows.net
Status code: 400
Error Code: DM_GWPipeline_Gateway_MashupDataAccessError
Time: Tue Dec 20 2016 10:18:48 GMT-0500 (Eastern Standard Time)
Version: 13.0.1700.811
Underlying error code: -2147467259
Underlying error message: The provider being used is deprecated: 'System.Data.OracleClient requires Oracle client software version 8.1.7 or greater.'. Please visit https://go.microsoft.com/fwlink/p/?LinkID=272376 to install the official provider.
DM_ErrorDetailNameCode_UnderlyingHResult: -2147467259
Microsoft.Data.Mashup.ValueError.Reason: DataSource.Error
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