Request contains an invalid argument.

['Ibrahim Jarrar' via Google Ads API and AdWords API Forum]

I am getting this error with no idea whats the reason, it happens both in 
v11 and v12 of the API, any clues would be really appreciated:

(<_InactiveRpcError of RPC that terminated with:
status = StatusCode.INVALID_ARGUMENT
details = “Request contains an invalid argument.”
debug_error_string = “UNKNOWN:Error received from peer 
ipv4:172.217.16.42:443 {created_time:“2023-03-07T11:49:42.198406+01:00”, 
grpc_status:3, grpc_message:“Request contains an invalid argument.“}”
>, <_InactiveRpcError of RPC that terminated with:
status = StatusCode.INVALID_ARGUMENT
details = “Request contains an invalid argument.”
debug_error_string = “UNKNOWN:Error received from peer 
ipv4:172.217.16.42:443 {created_time:“2023-03-07T11:49:42.198406+01:00”, 
grpc_status:3, grpc_message:“Request contains an invalid argument.“}”
>, errors {
  error_code {
    request_error: UNKNOWN
  }
  message: “The error code is not in this version.”
  location {
    field_path_elements {
      field_name: “operations”
      index: 0
    }
    field_path_elements {
      field_name: “update”
    }
    field_path_elements {
      field_name: “resource_name”
    }
  }
}
request_id: “EkD68T9hnWlYbaRFzGcpDg”
, ‘EkD68T9hnWlYbaRFzGcpDg’)
python-BaseException
status = StatusCode.INVALID_ARGUMENT
details = “Request contains an invalid argument.”
debug_error_string = “UNKNOWN:Error received from peer 
ipv4:172.217.16.42:443 {created_time:“2023-03-07T11:49:42.198406+01:00”, 
grpc_status:3, grpc_message:“Request contains an invalid argument.“}”
>, <_InactiveRpcError of RPC that terminated with:
status = StatusCode.INVALID_ARGUMENT
details = “Request contains an invalid argument.”
debug_error_string = “UNKNOWN:Error received from peer 
ipv4:172.217.16.42:443 {created_time:“2023-03-07T11:49:42.198406+01:00”, 
grpc_status:3, grpc_message:“Request contains an invalid argument.“}”
>, errors {
  error_code {
    request_error: UNKNOWN
  }
  message: “The error code is not in this version.”
  location {
    field_path_elements {
      field_name: “operations”
      index: 0
    }
    field_path_elements {
      field_name: “update”
    }
    field_path_elements {
      field_name: “resource_name”
    }
  }
}
request_id: “EkD68T9hnWlYbaRFzGcpDg”
, ‘EkD68T9hnWlYbaRFzGcpDg’)

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