Received the following error in Logstash 6.8.3 -- trying to use TCP Input with SSL.

[2019-10-22T22:30:21,891][ERROR][logstash.inputs.tcp ] Error in Netty pipeline: io.netty.handler.codec.DecoderException: error:10000418:SSL routines:OPENSSL_internal:TLSV1_ALERT_UNKNOWN_CA

Here is my config:

input {
tcp {
port => 1514
type => syslog
ssl_enable => true
ssl_cert => "/etc/logstash/ssl/cert.pem"
ssl_key => "/etc/logstash/ssl/privkey.pem"
ssl_certificate_authorities => ["/etc/logstash/ssl/ca.pem"]

Not sure what is wrong in the config, I get the error in the log when I try to make a connection from a client.

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