java.lang.NoClassDefFoundError: jakarta/servlet/http/HttpServlet

This error occurs when the class loader is unable to find the specified class at runtime. In this case, the class "jakarta.servlet.http.HttpServlet" could not be found.

This error can occur due to various reasons such as:

1. Missing or corrupted JAR files
2. Incorrect classpath settings
3. Incompatible versions of libraries

To resolve this error, you can try the following:

1. Ensure that the required JAR files are present in the classpath.
2. Check if the classpath is set up correctly.
3. Make sure that the versions of the libraries used are compatible with each other.
4. Try cleaning and rebuilding the project.
5. If the error persists, try using a different version of the library or framework.