I am currently developing an Apple MDM solution as a vendor and have successfully obtained the Vendor Certificate from the Apple Developer Portal. However, when attempting to generate and upload the Certificate Signing Request (CSR) to the Apple Push Certificates Portal Portal Link. I encounter the error: "Invalid Certificate Signing Request." I have followed the official Apple documentation outlined here, but the issue persists. Doc Link Could you please guide me through the correct process to generate a valid CSR and successfully upload it? Any assistance would be greatly appreciated. Thank you for your time and support.

Hi I am trying to develop Apple MDM solution as a vendor. I got the Vendor certificate from apple developer portal. When I was trying to generate the csr and upload to Portal (https://identity.apple.com/pushcert/) It says Invalid Certificate Signing Request. I had also tried to follow documentation (https://developer.apple.com/documentation/devicemanagement/setting-up-push-notifications-for-your-mdm-customers) but still the same error. Can anyone please guide how to generate the csr.