3274776 - Failed to import data from SAP Datasphere OData API into SAP Analytics Cloud

The import job fails when loading data from SAP Datasphere into SAP Analytics Cloud (SAC) via OData API:

Datasphere_Source_Name has failed to upload because of an error in the plugin service
Correlation ID

In DevTools (or HAR File) from browser, you get more details:

The following error message comes from the external data service: status: 400 body: {"error":{"code":"400","message":"Not supported: $count on entity with annotation @Capabilities.CountRestrictions.Countable: false","@Common.numericSeverity":4}} 

or when trying to refresh the import job, following appears: 

Error "[xxx] has failed to upload because of an error in the plugin service."

In DevTools (or HAR File) from browser, you get more details:

{\"code\":\"ERROR_FROM_EXTERNAL_SERVER\",\"rawError\":\"Response from external server has status code of 400\",\"params\":[\"status: 400 body: {\\\"status\\\":400,\\\"message\\\":\\\"Bad request; please refer to documentation\\\"}\"]}

SAP Analytics Cloud

SAP Datasphere

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