You need to use an HTTP Request activity instead.
Example:
Assign variable ReleaseKeyValue: "BlankProcess8:1.0.2"
Assign variable PathForDownload: "C:\Marian\DownloadPackages\" + String.Format("{0}.nupkg",ReleaseKeyValue).Replace(":",".")
Endpoint: String.Format("https://cloud.uipath.com/your_org_name/your_tenant_name/orchestrator_/odata/Processes/UiPath.Server.Configuration.OData.DownloadPackage(key='{0}')",ReleaseKeyValue)
Method: GET
AcceptFormat: ANY
Headers:
Authorization: Bearer + access_token
X-UIPATH-OrganizationUnitId: YOUR_FOLDER_ID
Content-Type: "application/octet-stream"
Content-Disposition: "attachment"
BodyFormat: "multipart/form-data"
ResourcePath: PathForDownload
