Io(Custom { kind: Other, error: "handshake error" })

[F3nryll]

I am on Centos 7.9, I run murmur 1.3.4 with the same Let's Encrypt certificates that I use on the Apache 2.4.46 virtual host serving the mumble-web client.
I have no error in the mumur.log, but here is what I have in the terminal where I run the mumble-web-proxy when I try to login with a mumble-web client:

MSG Authenticate: username: "root" password: "{{snip}}" opus: false webrtc: true
Local ice candidate: 1 1 UDP 2015363327 2001:41d0:203:5c92:: 60900 typ host
Local ice candidate: 2 1 TCP 1015021823 2001:41d0:203:5c92:: 0 typ host tcptype active
Local ice candidate: 3 1 TCP 1010827519 2001:41d0:203:5c92:: 46443 typ host tcptype passive
Local ice candidate: 4 1 UDP 2015363583 51.91.212.146 33703 typ host
Local ice candidate: 5 1 TCP 1015022079 51.91.212.146 0 typ host tcptype active
Local ice candidate: 6 1 TCP 1010827775 51.91.212.146 49369 typ host tcptype passive
Local ice candidate: 7 1 UDP 2015363839 fe80::ae1f:6bff:fed2:922a 60353 typ host
Local ice candidate: 8 1 TCP 1015022335 fe80::ae1f:6bff:fed2:922a 0 typ host tcptype active
Local ice candidate: 9 1 TCP 1010828031 fe80::ae1f:6bff:fed2:922a 38663 typ host tcptype passive
Got WebRTC: ice_pwd: "CtMtQFwI+f3BzfE2hq6vjyS1" ice_ufrag: "VAME" dtls_fingerprint: "F2:27:E9:59:0C:B2:B3:8E:20:91:FC:B5:EC:B8:A2:0D:B7:2B:A0:8A:EA:61:61:2B:7A:59:E5:6C:E3:F9:C1:13"
Got ice candidate: "candidate:827971567 1 udp 2122260223 192.168.0.234 60486 typ host generation 0 ufrag VAME network-id 1 network-cost 10"
Error on connection [::ffff:127.0.0.1]:44420: Io(Custom { kind: Other, error: "handshake error" })

I tried to google different parts of this message, without any luck..

In case, here is my apache config:

<VirtualHost 51.91.212.146:443>
        ServerAdmin webmaster@localhost
        DocumentRoot "/var/www/mumble-web"
        ServerName voice.chibre.ch
        <Directory "/var/www/muble-web">
                allow from all
                Options None
                Require all granted
        </Directory>
    Include /etc/letsencrypt/options-ssl-apache.conf
    SSLCertificateFile /etc/letsencrypt/live/voice.chibre.ch/fullchain.pem
        SSLCertificateKeyFile /etc/letsencrypt/live/voice.chibre.ch/privkey.pem
        RewriteEngine On
        #ProxyPass /.wellknown !
#MUMBLE
        RewriteCond %{HTTP:Connection} Upgrade [NC]
        RewriteCond %{HTTP:Upgrade} websocket [NC]
        RewriteRule / ws://127.0.0.1:64737/ [P,L]
    ProxyPass / http://127.0.0.1:64737/
    ProxyPassReverse / http://127.0.0.1:64737
</VirtualHost>
</IfModule>

(updated log/config snippets formatting with apologies from a github noob ;)

[F3nryll]

So, I went for a simplified apache conf:

<VirtualHost 51.91.212.146:443>
	ServerName voice.chibre.ch

	DocumentRoot /var/www/mumble-web

	SSLEngine on
	SSLCertificateFile /etc/letsencrypt/live/voice.chibre.ch/cert.pem
	SSLCertificateKeyFile /etc/letsencrypt/live/voice.chibre.ch/privkey.pem
	SSLCertificateChainFile /etc/letsencrypt/live/voice.chibre.ch/chain.pem

	<Location /_voice>
		ProxyPass ws://127.0.0.1:64737/
		ProxyPassReverse ws://127.0.0.1:64737/
	</Location>
</VirtualHost>
</IfModule>

And tried to build murmur 1.4.0, as the static linux server of the 1.3.4 is using an outdated version of OpenSSL.
I set the same certificates in murmur.ini than in my apache config.

But no luck, still:

Error on connection [::ffff:127.0.0.1]:57124: Io(Custom { kind: Other, error: "handshake error" })

Not sure where to go from there, if I have to investigate on SSL parameters such as ''sslCiphers''..

this is the js console output if that can help..

Connecting to server voice.chibre.ch
client.js:477 Unhandled data packet: {name: "CryptSetup", payload: Message}
client.js:477 Unhandled data packet: {name: "CodecVersion", payload: Message}
client.js:477 Unhandled data packet: {name: "PermissionQuery", payload: Message}
index.js:1367 Connected!
client.js:477 Unhandled data packet: {name: "ServerConfig", payload: Message}
voice.js:201 vad: stop
voice.js:197 vad: start
index.js:1367 Connection error: Error: write after end
    at writeAfterEnd (_stream_writable.js:144)
    at ReaDuplexer../node_modules/reduplexer/node_modules/readable-stream/lib/_stream_writable.js.Writable.write (_stream_writable.js:192)
    at MumbleClient._send (client.js:297)
    at MumbleClient.createVoiceStream (client.js:387)
    at VADVoiceHandler._getOrCreateOutbound (voice.js:74)
    at VADVoiceHandler._write (voice.js:236)
    at doWrite (_stream_writable.js:428)
    at writeOrBuffer (_stream_writable.js:417)
    at VADVoiceHandler../node_modules/readable-stream/lib/_stream_writable.js.Writable.write (_stream_writable.js:334)
    at index.js:1622