ADF Copy data error

Question

Copy data activity in the pipeline failed with the following error. Source is gzip csv file and sink is parquet. failure is at the source. LS connection works on both using Account Key or Managed Identity. Tried both using keyvault (blob.core.wondows.net) and managed identity (dfs.core.wondows.net). Error message is the same for either connection method.

{
    "errorCode": "2200",
    "message": "ErrorCode=AdlsGen2InvalidUrl,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Invalid url 'DefaultEndpointsProtocol=https;AccountName=xxxxx;AccountKey=' provided, expecting http[s]://<accountname>.dfs.core.windows.net.,Source=Microsoft.DataTransfer.ClientLibrary,''Type=System.UriFormatException,Message=Invalid URI: The format of the URI could not be determined.,Source=System,'",
    "failureType": "UserError",
    "target": "COPY-DATA",
    "details": []
}