Hi @danish15ce71 ,
the error happens during startup of InfraWorks when the program is trying to get a connection to the Autodesk License Server.
Could you please check if you have a proxy server installed or an Anti-Virus or Firewall program is blocking the connections?
The following article shows what server addresses need to be accessible for InfraWorks:
http://knowledge.autodesk.com/article/Login-to-Autodesk-Infraworks-360-does-not-work-when-using-a-Pr...
By the way, what version of InfraWorks didyou install? It looks like an older version. Please install the latest version 2020.1 to be sure that you are up to date.
Regards,
Karsten.
Karsten Saenger