Hi Maddy,
Have you changed the URL before entering it in the Logical System?
If not then please append '?~transaction=IC_LTX&~okcode=ICEXECUTE' after 'webgui' in the URL as mentioned above.
For more details on how to build URL for logical system for TL go through below link.
Defining Transaction Launcher Logical Systems and URLs - Interaction Center WebClient - SAP Library
Thanks
Kumar