IDEA marks the import of class form the Java 10 module as an error, but run application without any errors

Hello.

IDEA marks the import of class form the Java 10 module as an error, but run application without any errors.

What steps should be taken to prevent the import from being marked as an error?

You can see it in the video:

https://youtu.be/15qm3cvjvYE 

or in the screenshot:

Also demo project you can find on GitHub:

https://github.com/MyTempGitForCommunity/IIDEAmarksImportOfClassFormJava10ModuleAsAnError

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IntelliJ IDEA 2018.1.3 (Ultimate Edition)
Build #IU-181.4892.42, built on May 8, 2018
Licensed to Aleksey Baranov
Subscription is active until September 8, 2018
JRE: 1.8.0_152-release-1136-b38 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.13.4