Elastalert certification on ELK 8

I am having an error and not ebale to setup the certification for pem in ELK. The certification comes end with. . 12 not pem. I tired to generate it using ELK tools but it did not work

Elastalert is not an Elastic product, it is an open-source project started by Yelp. Please seek help for that product elsewhere or use Kibana Alerting (which we do make). We'd be happy to help you with Kibana Alerting.