start rabbitmq-server FAILED :( (on controller)

Hi, rabbitmq-server dont want to start. I dont know what to do.
Logs :

Setting up rabbitmq-server (2.7.1-0ubuntu4) ...
Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
rabbitmq-server.
invoke-rc.d: initscript rabbitmq-server, action "start" failed.
dpkg: error processing rabbitmq-server (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 rabbitmq-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

Does anybody have some idea?
Thank you a lot