Cannot open index page in Thymeleaf, getting 404 in Intellij IDEA

I’ve created simple demo for Spring boot and Thymeleaf, but I cannot open index page.

Controller code:

package com.jrp.demo.web;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
 
@Controller
public class HomeController {
 
    @RequestMapping(value = "/")
    public String home() {
        return "index";
    }
}

Having index template in /src/main/resources/templates/index.html

Having application.properties:

server.port=9095

And going to the address http://localhost:9095/

And getting error:

2021-12-10 11:08:32.200 DEBUG 11124 --- [nio-9095-exec-2] o.s.web.servlet.DispatcherServlet        : GET "/", parameters={}
2021-12-10 11:08:32.200 DEBUG 11124 --- [nio-9095-exec-2] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to com.jrp.demo.web.HomeController#home()
2021-12-10 11:08:32.201 DEBUG 11124 --- [nio-9095-exec-2] o.s.w.s.v.ContentNegotiatingViewResolver : Selected 'text/html' given [text/html, application/xhtml+xml, image/avif, image/webp, image/apng, application/xml;q=0.9, application/signed-exchange;v=b3;q=0.9, */*;q=0.8]
2021-12-10 11:08:32.201 DEBUG 11124 --- [nio-9095-exec-2] o.s.w.servlet.view.InternalResourceView  : View name 'index', model {}
2021-12-10 11:08:32.201 DEBUG 11124 --- [nio-9095-exec-2] o.s.w.servlet.view.InternalResourceView  : Forwarding to [index]
2021-12-10 11:08:32.201 DEBUG 11124 --- [nio-9095-exec-2] o.s.web.servlet.DispatcherServlet        : "FORWARD" dispatch for GET "/index", parameters={}
2021-12-10 11:08:32.202 DEBUG 11124 --- [nio-9095-exec-2] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped to ResourceHttpRequestHandler [classpath [META-INF/resources/], classpath [resources/], classpath [static/], classpath [public/], ServletContext [/]]
2021-12-10 11:08:32.204 DEBUG 11124 --- [nio-9095-exec-2] o.s.w.s.r.ResourceHttpRequestHandler     : Resource not found
2021-12-10 11:08:32.204 DEBUG 11124 --- [nio-9095-exec-2] o.s.web.servlet.DispatcherServlet        : Exiting from "FORWARD" dispatch, status 404
2021-12-10 11:08:32.204 DEBUG 11124 --- [nio-9095-exec-2] o.s.web.servlet.DispatcherServlet        : Completed 404 NOT_FOUND
2021-12-10 11:08:32.204 DEBUG 11124 --- [nio-9095-exec-2] o.s.web.servlet.DispatcherServlet        : "ERROR" dispatch for GET "/error", parameters={}
2021-12-10 11:08:32.207 DEBUG 11124 --- [nio-9095-exec-2] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController#errorHtml(HttpServletRequest, HttpServletResponse)
2021-12-10 11:08:32.220 DEBUG 11124 --- [nio-9095-exec-2] o.s.w.s.v.ContentNegotiatingViewResolver : Selected 'text/html' given [text/html, text/html;q=0.8]
2021-12-10 11:08:32.220 DEBUG 11124 --- [nio-9095-exec-2] o.s.web.servlet.DispatcherServlet        : Exiting from "ERROR" dispatch, status 404

Spring boot class is:

package com.jrp.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

and pom.xml contains spring-boot-starter-thymeleaf and spring-boot-starter-web.

Answer

As described in following answer, Intellij IDEA had outdated dependencies, so helped buttons Reload all maven projects and Generate sources and update folders for all projects.

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Answer