Thanks for the details. I agree that that certificate is expired and also that it’s never been renewed:
https://crt.sh/?Identity=%uptoconcept.com&iCAID=16418
You could tell people on the Plesk forum that no renewal certificate has ever been issued, based on the above link. (Sometimes there are software bugs where a certificate gets successfully renewed but then not reinstalled, but we can confirm that that’s not the case here.)