Can we disable the client login option in the knowledge base?

Solution: Yes, to disable required login from the customer portal, go to Configuration > System > General > My tickets and disable ''Require authentication''.  Additionally, if you want to completely remove the Login/My tickets options, you can use custom CSS in your LiveAgent admin panel. For detailed steps and the required CSS code, refer to this guide: How to remove the Login/My tickets links and Register option from the customer portal menu