How to Fix the Error “Error Could Not Find Or Load Main Class Or Apache Catalina Startup Bootstr”

You may encounter an error saying, “Error: Could not find or load main class org Apache Catalina startup bootstr.” This error means that your application has not been started because you do not have a main class loaded in the project. If you encounter this error, you may want to learn how to fix this. This article aims to solve this problem in the easiest way possible.