Probably a network error, is the server down?: [object Object]

[Ashraf Bendary]

when i test any demo i got this error 

Probably a network error, is the server down?: [object Object]

and when i start janus with this command : janus start

i got this response

Janus commit: not-a-git-repo

Compiled on:  Fri Feb  7 23:32:33 UTC 2020

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  Starting Meetecho Janus (WebRTC Server) v0.7.3

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Checking command line arguments...

Debug/log level is 4

Debug/log timestamps are disabled

Debug/log colors are enabled

Adding 'vmnet' to the ICE ignore list...

Using 172.31.5.201 as local IP...

[WARN] Token based authentication disabled

Initializing recorder code

Initializing ICE stuff (Full mode, ICE-TCP candidates disabled, half-trickle, IPv6 support disabled)

TURN REST API backend: (disabled)

[WARN] Janus is deployed on a private address (172.31.5.201) but you didn't specify any STUN server! Expect trouble if this is supposed to work over the internet and not just in a LAN...

Crypto: OpenSSL >= 1.1.0

Fingerprint of our certificate: 45:15:32:2C:CA:6F:23:20:AE:FF:5F:C4:51:72:1C:86:F9:0C:3A:CF:67:15:E5:B8:74:78:8A:5C:C4:AB:BD:FF

[WARN] Event handlers support disabled

Plugins folder: /usr/lib/x86_64-linux-gnu/janus/plugins

Loading plugin 'libjanus_sip.so'...

Sessions watchdog started

Joining Janus requests handler thread

JANUS SIP plugin initialized!

Loading plugin 'libjanus_videoroom.so'...

JANUS VideoRoom plugin initialized!

Loading plugin 'libjanus_lua.so'...

[echotest.lua] Loading...

[echotest.lua] Loaded

[echotest.lua] Initializing...

[echotest.lua] Initialized

Janus Lua plugin initialized!

Loading plugin 'libjanus_voicemail.so'...

JANUS VoiceMail plugin initialized!

Loading plugin 'libjanus_audiobridge.so'...

JANUS AudioBridge plugin initialized!

Loading plugin 'libjanus_nosip.so'...

JANUS NoSIP plugin initialized!

Loading plugin 'libjanus_duktape.so'...

[echotest.js]  Loading script...

[echotest.js]  Modules folder: /usr/share/janus/duktape

[echotest.js]  Loading module: janus-sdp

[echotest.js]  Module loaded

[echotest.js]  Script loaded

[echotest.js]  Initializing...

[echotest.js]  Initialized

Janus JavaScript plugin (Duktape) initialized!

Loading plugin 'libjanus_sipre.so'...

Joining libre loop thread...

[WARN] sip_set_trace() was not found in libre... The tracing of SIP incoming/outgoing SIP messages when using the SIPre plugin will not be available to Event Handlers. In case you're interested in that, apply this patch on your libre installation and recompile the plugin: https://raw.githubusercontent.com/alfredh/patches/master/re-sip-trace.patch

JANUS SIPre plugin initialized!

Loading plugin 'libjanus_streaming.so'...

[ERR] [plugins/janus_streaming.c:janus_streaming_create_fd:4592] [gstreamer-sample] Bind failed for audio (port 5002)...

[ERR] [plugins/janus_streaming.c:janus_streaming_create_rtp_source:4793] Can't bind to port 5002 for audio...

[ERR] [plugins/janus_streaming.c:janus_streaming_init:1608] Error creating 'rtp' stream 'gstreamer-sample'...

[ERR] [plugins/janus_streaming.c:janus_streaming_init:1648] Can't add 'live' stream, no such file '/usr/share/janus/streams/radio.alaw'...

[ERR] [plugins/janus_streaming.c:janus_streaming_init:1713] Can't add 'ondemand' stream, no such file '/usr/share/janus/streams/music.mulaw'...

JANUS Streaming plugin initialized!

Loading plugin 'libjanus_videocall.so'...

JANUS VideoCall plugin initialized!

Loading plugin 'libjanus_recordplay.so'...

JANUS Record&Play plugin initialized!

Loading plugin 'libjanus_textroom.so'...

JANUS TextRoom plugin initialized!

Loading plugin 'libjanus_echotest.so'...

JANUS EchoTest plugin initialized!

Transport plugins folder: /usr/lib/x86_64-linux-gnu/janus/transports

Loading transport plugin 'libjanus_nanomsg.so'...

[ERR] [transports/janus_nanomsg.c:janus_nanomsg_init:205] Error binding Janus API Nanomsg socket to address 'ipc:///tmp/janus.ipc': 98 (Address already in use)

[WARN] Nanomsg server disabled (Admin API)

[WARN] No Nanomsg server started, giving up...

[WARN] The 'janus.transport.nanomsg' plugin could not be initialized

Loading transport plugin 'libjanus_websockets.so'...

Segmentation fault (core dumped)