Build Error in Java 11 - Githubissues

I am attempting to build a local checkout of this project, but I get following error:

➜ ./gradlew build 

Welcome to Gradle 5.6.3!

Here are the highlights of this release:
 - Incremental Groovy compilation
 - Groovy compile avoidance
 - Test fixtures for Java projects
 - Manage plugin versions via settings script

For more details see https://docs.gradle.org/5.6.3/release-notes.html

Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details
Configuration(s) specified but the install task does not exist in project :.
Configuration(s) specified but the install task does not exist in project :kgraphql.
Configuration(s) specified but the install task does not exist in project :kgraphql-ktor.

> Task :kgraphql:compileKotlin FAILED
e: .../kgraphql/src/main/kotlin/com/apurebase/kgraphql/request/Lexer.kt: (8, 37): Symbol is declared in module 'jdk.scripting.nashorn' which does not export package 'jdk.nashorn.internal.r
untime'
e: .../KGraphQL/kgraphql/src/main/kotlin/com/apurebase/kgraphql/request/Lexer.kt: (528, 26): Symbol is declared in module 'jdk.scripting.nashorn' which does not export package 'jdk.nashorn.internal
.runtime'
e: .../KGraphQL/kgraphql/src/main/kotlin/com/apurebase/kgraphql/request/Lexer.kt: (528, 40): Symbol is declared in module 'jdk.scripting.nashorn' which does not export package 'jdk.nashorn.internal
.runtime'

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':kgraphql:compileKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 11s
4 actionable tasks: 1 executed, 3 up-to-date

➜ java -version      
openjdk version "11.0.5" 2019-10-15 LTS
OpenJDK Runtime Environment Corretto-11.0.5.10.1 (build 11.0.5+10-LTS)
OpenJDK 64-Bit Server VM Corretto-11.0.5.10.1 (build 11.0.5+10-LTS, mixed mode)

Can you please advise how to fix this ?

It seems Lexer.kt uses some internal API that is not exposed.

aPureBase / KGraphQL

Build Error in Java 11 #76