GWT : Class 'java.util.concurrent.CompletableFuture' is not present in JRE Emulation INTELLIJ IDEA

Question

I am working on a GWT project in IntelliJ IDEA Ultimate 2023.3.2

All is running fine.

But IntelliJ keeps telling me that java class files are not present in JRE Emulation Library.

Please help :)

Class 'java.util.concurrent.CompletableFuture' is not present in JRE Emulation Library so it cannot be used in client code of 'com.srr.ShopManager' GWT module

Sorry did forget to add source is included from

<dependency>
    <groupId>com.ekotrope</groupId>
    <artifactId>gwt-completablefuture</artifactId>
    <version>1.0.0</version>
</dependency>

Answer 1

Only solution is to disable inspection Warning in IntelliJ