Merge pull request #8352 from isabelcabezasm/patch-1

Error creating the device enrollment entry

Author: GitHubber17

articles/iot-dps/how-to-connect-mxchip-iot-devkit.md

@@ -114,6 +114,17 @@ To save a unique device secret on the DevKit:
 
    ![Upload certificate](./media/how-to-connect-mxchip-iot-devkit/upload-cert.png)
 
+  > [!NOTE]
+  > If you have an error with this message:
+  >
+  > `{"message":"BadRequest:{\r\n \"errorCode\": 400004,\r\n \"trackingId\": \"1b82d826-ccb4-4e54-91d3-0b25daee8974\",\r\n \"message\": \"The certificate is not a valid base64 string value\",\r\n \"timestampUtc\": \"2018-05-09T13:52:42.7122256Z\"\r\n}"}`
+  >
+  > Open the certificate file **.pem** as text (open with Notepad or any text editor), and delete the lines:
+  >
+  > `"-----BEGIN CERTIFICATE-----"` and `"-----END CERTIFICATE-----"`.
+  >
+
+
 ## Start the DevKit
 
 1. Open VS Code and the serial monitor.