spring boot – Unable to download/install Thymeleaf plugin in Eclipse IDE

I am trying to install/download thymeleaf plugin using update site url (www.thymeleaf.org/eclipse-plugin-update-site/) but whenever I am entering this url, my eclipse giving me this error “There is no categorized item”

see image for reference

I am trying to install thymeleaf from Install new Software tab. If anyone has faced this issue earlier pls help. I am new to spring and spring boot. I am following a tutorial but I’m not able to install thymeleaf.

Thank You.