You applied for an SSL certificate through Alibaba Cloud's SSL Certificates Service During the application,...

You must revoke your certificate and re-apply, this time choosing "Automatic" at the "CSR Generation" step. Otherwise, the SSL certificate cannot be downloaded

You can download a crt file of type "Other" from the SSL Certificates Service console, then use openssl to convert this file to pfx format for use with Apache

SSL Certificates Service doesn't support the type of certificates needed by Apache. They cannot be used together

You can use the "generate pfx file" function built into the SSL Certificates Service to manually generate and download the pfx file needed by Apache