WebClient not resolving

In order to utilise the new `WebClient` API, I've included `spring-webflux` in my Intellij project.

dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
compile 'org.springframework.boot:spring-boot-starter-webflux'
// compile group: 'org.springframework', name: 'spring-webflux', version: '5.2.7.RELEASE'

testImplementation('org.springframework.boot:spring-boot-starter-test') {
exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
}
}

However, WebClient remains unresolved:
C:\Users\tobia\Documents\spring-app\service\Service.java:25: error: cannot find symbol
System.out.println(WebClient.Builder());
^
symbol: variable WebClient
location: class Service

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The dependency itself seems to have resolved, as `webflux` is now in my "external libraries" list:

https://i.stack.imgur.com/h1swN.png

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Does anybody have any idea why `WebClient` remains unresolved?