i'm running a cron to backup MySQL to S3. I'm running into the following error. I'd appreciate some help

An error occurred while processing the database mysql railway, host: mysql-ambe.railway.internal):

Error: Command failed: mariadb-dump -u root -XXX -h mysql-ambe.railway.internal -P 3306 –skip-ssl railway > "/tmp/backup-mysql-2025-02-17_13:47:22-railway-mysql-ambe.railway.internal.tar.gz.dump"

mariadb-dump: Got error: 2026: "TLS/SSL error: self-signed certificate in certificate chain" when trying to connect