How to start Janus WebRTC gateway?
<p>I installed successful Janus on /usr/local/lib and I re-configure to start Janus. But when I do <code>sudo janus</code>, I get this error:</p>

<pre><code>/*
debian@beaglebone:/usr/local/bin$ janus
---------------------------------------------------
  Starting Meetecho Janus (WebRTC Gateway) v0.1.0
---------------------------------------------------

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 10.92.200.16 as local IP...
[WARN] Token based authentication disabled
Initializing ICE stuff (Full mode, ICE-TCP candidates disabled, IPv6 support disabled)
ICE handles watchdog started
TURN REST API backend: (disabled)
[WARN] Janus is deployed on a private address (10.92.200.16) 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...
BUNDLE is NOT going to be forced
rtcp-mux is NOT going to be forced
Fingerprint of our certificate: D2:B9:31:8F:DF:24:D8:0E:ED:D2:EF:25:9E:AF:6F:B8:34:AE:53:9C:E6:F3:8F:F2:64:15:FA:E8:7F:53:2D:38
[WARN] Data Channels support not compiled
Plugins folder: /usr/local/lib/janus/plugins
Loading plugin 'libjanus_voicemail.so'...
JANUS VoiceMail plugin initialized!
Loading plugin 'libjanus_recordplay.so'...
JANUS Record&amp;Play plugin initialized!
Loading plugin 'libjanus_echotest.so'...
VoiceMail watchdog started
EchoTest watchdog started
Record&amp;Play watchdog started
JANUS EchoTest plugin initialized!
Loading plugin 'libjanus_videocall.so'...
JANUS VideoCall plugin initialized!
Loading plugin 'libjanus_streaming.so'...
VideoCall watchdog started
JANUS Streaming plugin initialized!
Loading plugin 'libjanus_videoroom.so'...
JANUS VideoRoom plugin initialized!
Streaming watchdog started
Loading plugin 'libjanus_audiobridge.so'...
JANUS AudioBridge plugin initialized!
VideoRoom watchdog started
Loading plugin 'libjanus_sip.so'...
AudioBridge watchdog started
JANUS SIP plugin initialized!
Transport plugins folder: /usr/local/lib/janus/transports
Loading transport plugin 'libjanus_http.so'...
SIP watchdog started
[ERR] [janus.c:main:3684]       Couldn't load transport plugin 'libjanus_http.so': libmicrohttpd.so.12: cannot open shared object file: No such file or directory
[FATAL] [janus.c:main:3741] No Janus API transport is available... enable at least one and restart Janus
</code></pre>

<p>*/
libjanus_http.so and libmicrohttpd.so.12 are exist on usr/local/lib/janus/transport  and /usr/local/lib</p>

<p>What does the error mean?</p>