sec:authorize="isAnonymous()" no longer works with thymeleaf-extras-springsecurity5

[maykon-oliveira]

I have a Spring Boot 2.3.1 application that uses thymeleaf-extras-springsecurity5. The sec:authorize="isAnonymous()" it's not workning when user is no logged in. The sec:authorize="isAuthenticated()" works fine, after I login, the button logout appears.

pom.xml

       <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf.extras</groupId>
            <artifactId>thymeleaf-extras-springsecurity5</artifactId>
            <version>3.0.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>

statement

<a sec:authorize="isAnonymous()" href="#" th:href="@{/login}"
     class="whitespace-no-wrap text-base leading-6 font-medium text-gray-500 hover:text-gray-900 focus:outline-none focus:text-gray-900">
       isAnonymous
</a>

Github repo: https://github.com/maykon-oliveira/exame-chunin-devdojo

[ultraq]

I don't know very much about WebFlux and Reactive stuff, but it looks like there might be a problem w/ the combination of Thymeleaf + Spring Security + WebFlux as this has also been reported in #68

[roshanbachhav]

sec:authorize="isAnonymous()" when not working then check following dependency

             <dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter</artifactId>
	</dependency>

[towfiq-bK]

try adding below code:
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3"