If you have user permission rights to use Prompt, you must log out of Prompt properly and not just close the browser, in order to be able to access the anonymous user search page via the anonymous user link.
If you don't log-out completely, your computer will remember you are logged-in in the background and bring up the log-in screen to enter your credentials again.
To log out click the drop down arrow next to your name top right of screen.
Note: We have found logging out has not worked for all users and clearing their browser is the only option. If you have log-in access, you could favourite the Prompt URL in your Chrome browser so it takes you to the log-in page directly https://app.prompt.org.au