Resolving SSL certificate errors during Strapi Cloud deployment

Last updated: September 11, 2025

When deploying a new project on Strapi Cloud, you may encounter an SSL certificate error that displays as "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" in your browser. This error typically shows the message "This site can't provide a secure connection" along with "[your-project-url] uses an unsupported protocol."

Why this error occurs

This error is normal behavior during the initial deployment of new Strapi Cloud applications. It occurs because the SSL certificate for your project is still being provisioned and is not yet ready to serve secure connections.

How to resolve the issue

The SSL certificate provisioning process is automatic and requires no action on your part. Simply wait for the certificate generation to complete, which can take up to 20 minutes for new applications.

During this time:

  • Do not attempt to troubleshoot the SSL error

  • Avoid making changes to your project configuration

  • Wait patiently for the provisioning process to finish

When to expect resolution

Your website should become accessible with a valid SSL certificate within 20 minutes of deployment. Once the certificate is fully provisioned, the error will disappear and you'll be able to access your Strapi Cloud project normally through HTTPS.

If the error persists beyond 20 minutes, then it may indicate a genuine issue that requires further investigation.