This is quite common error in spring boot application which says 404(page not found).
We can mostly resolve this in 3 ways :
Custom Error Controller : where you will be implementing ErrorController interface which is provided by SpringFramework and then overriding its getErrorPath() so that you can return a custom path whenever such type of error is occurred.
By Displaying Custom error page : All you have to do is create an error.html page and place it into the src/main/resources/templates path. The BasicErrorController of of springboot will automatically pick this file by default.
By disabling the whitelabel error page : This is the easiest way where all you need to do is server.error.whitelabel.enabled property to false in the application.properties file to disable the whitelabel error page.
