Certificate error -javax.net.ssl.SSLHandshakeException: Received fatal alert: decrypt_error

Elastic Stack Elasticsearch
1 
Getting the below error while trying to access elasticsearch https://<server:name>/9200 and it says connection is not secure

DecoderException: javax.net.ssl.SSLHandshakeException: Received fatal alert: decrypt_error
        
Below is the elasticsearch.yml config

xpack.security.http.ssl.verification_mode: certificate
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.http.ssl.supported_protocols: TLSv1.2
xpack.security.transport.ssl.enabled: true
xpack.security.http.ssl.enabled: true
xpack.security.http.ssl.key: /opt/elastic/elasticsearch_7163/elasticsearch-7.16.3/config/certs/abc123.com.key
xpack.security.http.ssl.certificate: /opt/elastic/elasticsearch_7163/elasticsearch-7.16.3/config/certs/abc123.com_chain.crt
xpack.security.http.ssl.certificate_authorities: [ "/opt/elastic/elasticsearch_7163/elasticsearch-7.16.3/config/certs/abc123.com_chain.crt" ]
xpack.security.transport.ssl.key: /opt/elastic/elasticsearch_7163/elasticsearch-7.16.3/config/certs/abc123.com.key
xpack.security.transport.ssl.certificate: /opt/elastic/elasticsearch_7163/elasticsearch-7.16.3/config/certs/abc123.com_chain.crt
xpack.security.transport.ssl.certificate_authorities: [ "/opt/elastic/elasticsearch_7163/elasticsearch-7.16.3/config/certs/abc123.com_chain.crt" ]

I downloaded the certs from org and in the zip file - it had .crt, .key and pem file
2

Can you try adding this setting?

xpack.security.enabled: true

The default was changed in 8.0.0 to true. Prior versions defaulted to false, and it looks like you may be using 7.16.3.