Katalon activition in new account not working

I just created account and downloaded Katalon studio in my system. On running the application file its asking to activate, but on entering the e mail id and password which i used for downloading , its not working.
Application stays on same activation page…and nothing happens.
i an using centos 7… Please help

Hi @swatigoyal2050

Sorry for the late reply. Are you behind any proxy ?