Error connecting to Wazuh API

[spothound]

Wazuh	Splunk	Rev
v4.0.4	Splunk 8.1.1 (build 08187535c166)	67

Tested on Ubuntu 20

Description
With the current version of the plugin, it is impossible to connect with the Wazuh Manager's

/opt/splunk/var/log/splunk/splunkd.log

03-11-2021 19:34:04.865 +1200 ERROR ExecProcessor - message from "/opt/splunk/bin/python3.7 /opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py"     from ..appserver.controllers import wazuhtoken
03-11-2021 19:34:04.865 +1200 ERROR ExecProcessor - message from "/opt/splunk/bin/python3.7 /opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py" ImportError: attempted relative import with no known parent package
03-11-2021 19:34:19.848 +1200 ERROR ExecProcessor - message from "/opt/splunk/bin/python3.7 /opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py" Traceback (most recent call last):
03-11-2021 19:34:19.848 +1200 ERROR ExecProcessor - message from "/opt/splunk/bin/python3.7 /opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py"   File "/opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py", line 16, in <module>
03-11-2021 19:34:19.848 +1200 ERROR ExecProcessor - message from "/opt/splunk/bin/python3.7 /opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py"     from ..appserver.controllers import wazuhtoken
03-11-2021 19:34:19.848 +1200 ERROR ExecProcessor - message from "/opt/splunk/bin/python3.7 /opt/splunk/etc/apps/SplunkAppForWazuh/bin/check_queue.py" ImportError: attempted relative import with no known parent package

Steps to reproduce
Just install the plugin and try to connect with the Wazuh Manager's API.

Screenshots