Jakarta Servlet Exception: Thymeleaf Template Processing Error - Troubleshooting Guide

The error message indicates that there is a problem processing a request in a Java server-side application using the Jakarta Servlet API. Specifically, the error occurs during template processing with Thymeleaf, a popular Java template engine.\n\nThe issue is with a Thymeleaf expression that could not be parsed correctly. The expression in question is "(#request.)" and it appears on line 9, column 6 of the "error" template. The error message does not provide the complete expression, so it is difficult to determine the exact cause of the problem.\n\nTo fix this issue, you should review the Thymeleaf expression in the "error" template and ensure that it is valid. It seems that the expression may be incomplete or missing a specific attribute or value that Thymeleaf can parse.\n\nOnce you have identified and corrected the issue with the Thymeleaf expression, the request processing should be able to proceed without errors.