Java 9 (JLink) error when adding a third-party library

Question

Java 9 (JLink) error when adding a third-party library

EDIT: YOU CAN TRANSFER ON UPDATE 2018-02-13 AT THE END OF MAIL FOR UPDATED INFORMATION

I can provide full source code because this problem appeared in my open source JMarkPad project.

Basically:

The building always works, I get a working .jar without any problems.
Creating your own dist (start gradle link) WITHOUT third-party software (in this case, JFoenix) also works.
Creating your own dist (running gradle link) With third-party software (in this case, JFoenix) produces the following:

: linkAll
: JMarkPad: application: clean
: JMarkPad: application: compileJava
: JMarkPad: app: processResources
: JMarkPad: application: classes
: JMarkPad: :
: JMarkPad: :
:
: JMarkPad: : link FAILED
: linkAll FAILED

? , , , , .

.

Edit:

jlink app/ gradle.build:

commandLine "${java_home}/bin/jlink", '--module-path', "libs${File.pathSeparatorChar}${java_home}/jmods",
        '--add-modules', 'app', '--launcher', 'app=app/ui.UI', '--output', 'dist', '--strip-debug',
        '--compress', '2', '--no-header-files', '--no-man-pages'

2: :

9:28:38: Executing task 'link'...

:app:clean
:app:compileJava
:app:processResources
:app:classes
:app:jar
:app:link
Error: Module app not found
:app:link FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:link'.
> Process 'command 'C:\Program Files\Java\jdk-9.0.4/bin/jlink'' finished with non-zero exit value 1

* 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 1s
5 actionable tasks: 5 executed
Process 'command 'C:\Program Files\Java\jdk-9.0.4/bin/jlink'' finished with non-zero exit value 1
9:28:39: Task execution finished 'link'.