How to setup SSL correctly on an erlang/ elixir server?

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I have a valid Let's Encrypt SSL certificate which works as expected when setup on windows IIS:

https://www.sslshopper.com/ssl-checker.html#hostname=https://paperlesssolutionsltd.com.ng

enter image description here

When I apply same certificate to an Elixir ACE server like so:

certfile: Application.app_dir(@app, "priv/cert.pem"),
keyfile: Application.app_dir(@app, "priv/cert.key")

I get the following errors:

https://www.sslshopper.com/ssl-checker.html#hostname=https://paperlesssolutionsltd.com.ng:8443

enter image description here

Please what does Erlang SSL config require in order to fix this?

Thanks!

1 Answers
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