Can't login after first time

Can't login after first time

Hi, 
 I am having a weird issue with zoho people. When I trying to login in zoho people after first logout i can't login again.  It is showing me this message. 



Every other employees email is working fine. But when I add this email as a `Team Member` at first time it is working fine but when I logout its not working anymore. 

What would be the reason for this? 

Thanks