ServiceDesk app not starting after installation. Error starting PostgreSQL server

Hello everyone,

I hope somone can help.
I just installed the free version of ServiceDesk on a Ubuntu 16.04 machine.
While the install seemed to have gone through just fine, it does not start. When running the ./run.sh script, it ends up with this message:

Server is starting. This may take a couple of minutes ...
Free edition...

Trying to start PostgresSQL server failed
Unclean shutdown of previous run.
Failed to start the server. Please refer logs for more details

I cannot figure out why it failed. I don't know what "logs" is the message referring to. The /pgsqlerr.txt file doesn't have anything. I checked my system log /var/log/syslog but there is nothing to point me in the right direction. Anyone experienced this?