When I access a custom origin server domain over HTTPS, an error is reported.
The certificate configuration is incorrect or the custom origin server domain is not configured.
Log in to the COS console.
Click Bucket List in the left sidebar.
Click the name of the desired bucket to go to the configuration page.
Click Domains and Transfer > Custom Endpoint.
Select the desired domain and click Bind Certificate to configure the certificate.
Currently, certificate binding supports only the Beijing, Shanghai, Chengdu, and Hong Kong (China) regions. Binding wildcard certificates is not supported.
When the value of HTTPS certificate is Uploaded, you can use HTTPS.
For more information, please see Supporting HTTPS for Custom Endpoints.