Apache Tomcat 9 Bad Request

I am working on the advanced java course right now, and just downloaded Tomcat9, started it with the start.bat file, and used my web browser to go to localhost:8080 as it instructs, but I get the response Bad Request. Do I need to port forward this port on my router? Or is there something I am missing? Thanks for the help.
Bad Request

https://www.codecademy.com/courses/learn-advanced-java/articles/advanced-java-setting-up-our-environment-for-servlets