Renew Push Certificate
Unable to upload the Vendor-Signed Certificate Signing Request
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Have you read the "Related Article" linked at the top of this thread?
Assuming your user name indicates your geographic location, you might try calling the telephone number listed for UAE on that page. Here's the link again:
Contact Apple for help with Apple Push Notification service certificates - Apple Support
Assistance via this specific community, AppleWorks, is unlikely, as its main focus is Apples long discontinued productivity application, AppleWorks—a topic not in great demand mre than a decade after that applications announced EOL.
Regards,
Barry