Problem with digital certificate

Good afternoon, and I’m new here. I need to update the digital certificate of my Grafana server, which runs on Red Hat Linux. After transferring the new .crt and .key files, replacing the old ones, and running the command `systemctl restart grafana-server`, Grafana won’t start. A rollback fixes everything. Can anyone help me? I’ve already tried several procedures and haven’t had any success yet. Thank you in advance.