org.apache.jasper.JasperException: java.lang.ClassNotFoundException: org.apache.jsp.NewFile_jsp

This error occurs when the Java server pages (JSP) engine is unable to find the compiled class file for the JSP page.

Possible solutions:

1. Check if the JSP file is present in the correct directory and has been compiled successfully. If not, try to recompile the JSP file.

2. Check if the class file for the JSP page is present in the WEB-INF/classes directory. If not, try to recompile the JSP file and make sure the class file is generated in the correct directory.

3. Check if the classpath is set correctly in the server configuration file. If not, try to add the directory containing the class file to the classpath.

4. Check if there are any errors in the JSP file that could prevent it from being compiled. If so, fix the errors and recompile the JSP file.

5. Check if there are any conflicting versions of the same class file present in the classpath. If so, remove the conflicting version and try again.