Import your SSH key and login as bitnami@ip.of.server and you can find the credentials in ~/bitnami_credentials
Start the process manually with: sudo /opt/bitnami/bncert-tool
More info: https://docs.bitnami.com/aws/how-to/generate-install-lets-encrypt-ssl
See perm fix bash script below
https://docs.bitnami.com/aws/apps/wordpress/get-started/
https://docs.bitnami.com/aws/apps/wordpress/configuration/
https://docs.bitnami.com/aws/apps/wordpress/administration/
https://docs.bitnami.com/aws/apps/wordpress/troubleshooting/