Custom Power BI connector cannot refresh the dataset in PowerBI portal

I am able to connect Raiser's Edge NXT data using the custom Power BI connector on my desktop. I published the report to the Power BI portal. We have a generic Blackbaud ID account with full access to all the modules. I add this account to the Contributor List in the Application as well. The stored credential shows OK. Our DBA used this account to set up the data refresh. But it fails to refresh. Is there anything else I'm missing.

Here is the error message from the portal:

{"error":{"code":"DM_GWPipeline_Gateway_InvalidConnectionCredentials","pbi.error":{"code":"DM_GWPipeline_Gateway_InvalidConnectionCredentials","parameters":{},"details":[{"code":"DM_ErrorDetailNameCode_UnderlyingErrorCode","detail":{"type":1,"value":"-2147467259"}},{"code":"DM_ErrorDetailNameCode_UnderlyingErrorMessage","detail":{"type":1,"value":"The credentials provided for the Blackbaud source are invalid. (Source at Blackbaud.)"}},{"code":"DM_ErrorDetailNameCode_UnderlyingHResult","detail":{"type":1,"value":"-2147467259"}},{"code":"Microsoft.Data.Mashup.CredentialError.DataSourceKind","detail":{"type":1,"value":"Blackbaud"}},{"code":"Microsoft.Data.Mashup.CredentialError.DataSourceOriginKind","detail":{"type":1,"value":"Blackbaud"}},{"code":"Microsoft.Data.Mashup.CredentialError.DataSourceOriginPath","detail":{"type":1,"value":"Blackbaud"}},{"code":"Microsoft.Data.Mashup.CredentialError.DataSourcePath","detail":{"type":1,"value":"Blackbaud"}},{"code":"Microsoft.Data.Mashup.CredentialError.Reason","detail":{"type":1,"value":"AccessForbidden"}},{"code":"Microsoft.Data.Mashup.MashupSecurityException.DataSources","detail":{"type":1,"value":"[{\\"kind\\":\\"Blackbaud\\",\\"path\\":\\"Blackbaud\\"}]"}},{"code":"Microsoft.Data.Mashup.MashupSecurityException.Reason","detail":{"type":1,"value":"AccessForbidden"}}],"exceptionCulprit":1}}} Table: Fund.