It's installed as /usr/sbin/sniffjoke, you need to run it as root.

sniffjoke-autotest [SERVER DELIRANDOM DOWN]

• Stopping possible running sniffjoke (/usr/bin/sniffjokectl quit)
  GNuPG binary found: checking if key (1024D/7D9E677D 2011-05-21) is present on your keyring...

  SniffJoke key not found: importing in a temporary keyring...
  gpg: keyring /root/.gnupg/secring.gpg' created gpg: keyring/tmp/home/sj.gpgkeyring' created
  gpg: requesting key 7D9E677D from hkp server pgp.mit.edu
  gpg: key 7D9E677D: public key "SniffJoke project (http://www.delirandom.net/sniffjoke)" imported
  gpg: no ultimately trusted keys found
  gpg: Total number processed: 1
  gpg: imported: 1
  Key verified: 7D9E677D, SniffJoke project (http://www.delirandom.net/sniffjoke)

• retrivering multi-OS testing server list (http://www.delirandom.net/sjA/autotest.php?v=041)

• unable to retriver sj-server.info with curl from [http://www.delirandom.net/sjA/autotest.php?v=041]

sniffjoke [UNABLE TO FIND CONF FOLDER]

2015-09-07 14:04:18 is strongly suggest to use sniffjoke specifying a location (--location option): 'generic/' is used
2015-09-07 14:04:18 [runtime exception] going shutdown: UserConf() [ invalid parm: basedir (/usr/local/var/sniffjoke/) and location (generic) point to a non accessible directory: No such file or directory ]

mkdir /usr/local/var

mkdir /usr/local/var/sniffjoke

mkdir /usr/local/var/sniffjoke/generic

sniffjoke [UNABLE TO FIND CONF FILES]

2015-09-07 14:04:40 is strongly suggest to use sniffjoke specifying a location (--location option): 'generic/' is used
2015-09-07 14:04:40 configuration file /usr/local/var/sniffjoke/generic/sniffjoke-service.conf not accessible: No such file or directory, using default
2015-09-07 14:04:40 port aggressivity specifications in /usr/local/var/sniffjoke/generic/port-aggressivity.conf: No such file or directory, using defaults
2015-09-07 14:04:40 [runtime exception] going shutdown: UserConf() [ unable to access to enabler file plugins-enabled.conf: No such file or directory: location unaccepted ]

wget https://github.com/vecna/sniffjoke/archive/master.zip

unzip & copy conf/generic/. into /usr/local/var/sniffjoke/generic/

sniffjoke

2015-09-07 14:13:30 is strongly suggest to use sniffjoke specifying a location (--location option): 'generic/' is used
2015-09-07 14:13:30 SniffJoke started correctly, as INACTIVE: use "sniffjokectl start" to activate

sniffjoke --user root --group root --start

2015-09-07 14:18:08 SniffJoke started correctly and already ACTIVE, manage it with "sniffjokectl" if needed

sniffjokectl stat [SNIFFJOKE NOT RUNNING]

connection timeout: SniffJoke is not running, or --timeout too low

Due to the age of the OS (Kali Moto [v1], Kali Safi [v2], Kali Rolling 2016.x), these legacy versions are no longer supported.
We will be closing this ticket due to inactivity.

Please could you see if you are able to replicate this issue with the latest version of Kali Linux - https://www.kali.org/downloads/)?

If you are still facing the same problem, feel free to re-open the ticket. If you choose to do this, could you provide more information to the issue you are facing,and also give information about your setup?
For more information, please read: https://kali.training/topic/filing-a-good-bug-report/