AttributeError: 'Uknown' object has no attribute 'cmsinfo'

[niemant]

Hello I just cloned it In Kali's latest version, and I get the following error for detector.py:

−−−−−−−−−−−−−−−−−−−−
 [~] looking for cms
 [+] CMS : Uknown
 −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
 [~] Web Hosting Information
 [-] Cannot Find OS & HostingServer 
 −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
 [~] CMS Information Gathering
Traceback (most recent call last):
  File "/usr/share/vulnx/vulnx.py", line 155, in <module>
    detection()
  File "/usr/share/vulnx/vulnx.py", line 105, in detection
    instance.instanciate()
  File "/usr/share/vulnx/modules/detector.py", line 157, in instanciate
    instance.cmsinfo()
AttributeError: 'Uknown' object has no attribute 'cmsinfo'

I'm executing it as follows:
vulnx -u http://website.com --dns --cms

OS: Kali Linux 2020.2
Requiremets: Requirement already satisfied

Regards