HELP: Built in XMPP not working qith UE4. Not using correct certs?

Hey, I hope someone can help me

we are using the built in library for xmpp and as a test, this plugin > GitHub - Skrekkur/XMPPChatPlugin: Plugin for Unreal Engine 4 (UE4) to use XMPP chat from Blueprint

The issue is that with ssl enabled it will not connect.

It connects fine using a normal XMPP client (like pidgin)

If we disabled ssl on ejabbered it will allow an unsecure connection with Unreal.

In ejabbered we see this error:

@ejabberd_receiver:handle_info:194 TLS error = SSL_do_handshake failed: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca

it’s as if it’s not using the correct root certificates to accept our letsencrypt cert on ejabberd.

Anyone able to help? <3