Qlik Sense hub fails to connect after upgrade or install: Error requesting "/license/" Error: Connect ECONNREFUSED::1:4242

[Ranganath_DR]

Accessing the Qlik Sense hub after a fresh install or upgrade leads to:

An error occurred

Error requesting "/license/" - Error: Connect ECONNREFUSED::1:4242

Resolution

1. Set IPv4 as the preferred protocol
    
   

   This requires modification to the Windows Registry. Always back up your registry and consult with your Windows System administrator and Network admin before proceeding. Different methods may be preferred in your organization.

   1. Open the Windows Registry Editor (regedit)
      
      
   2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\
      
      
   3. Open Paramaters
      
      
   4. Add (or modify) the following DWORD to prefer IPv4 over IPv6:
      
      Name: DisabledComponents
      Type: REG_DWORD
      
      Decimal 32
      Hexadecimal 0x20
      
      
   5. Restart Windows. IPv4 will now be preferred.

Cause

nslookup (forward and reverse)  is not returning the correct Qlik sense host name.

Environment

Qlik Sense Enterprise on Windows 

Related Content 

Qlik Sense hub fails to connect with: Error requesting "https://SERVERNAME:4242/qrs/license/" Error ... 
Guidance for configuring IPv6 in Windows for advanced users 

[jopmoekotte]

Wow finally the post that helped me fix the problem we were stuck with for more than half a year!!