Unable to use Gitlab-scm-handler

[Riduidel]

When adding gitlab-scm-handler as maven dependency, I get the following exception

org.jboss.weld.exceptions.DeploymentException: WELD-001410: The injection point has non-proxyable dependencies: [BackedAnnotatedField] @Inject org.ndx.agile.architecture.gitlab.GitLabTicketsHandler.gitlab
	at org.ndx.agile.architecture.gitlab.GitLabTicketsHandler.gitlab(GitLabTicketsHandler.java:0)
  StackTrace
	at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:399)
	at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:290)
	at org.jboss.weld.bootstrap.Validator.validateGeneralBean(Validator.java:143)
	at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:164)
	at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:526)
	at org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:512)
	at org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:487)
	at org.jboss.weld.bootstrap.WeldStartup.validateBeans(WeldStartup.java:496)
	at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:93)
	at org.jboss.weld.environment.se.Weld.initialize(Weld.java:804)
	at org.jboss.weld.environment.se.Weld.initialize(Weld.java:176)
	at org.ndx.agile.architecture.base.ArchitectureDocumentationBuilder.main(ArchitectureDocumentationBuilder.java:33)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:282)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.jboss.weld.exceptions.UnproxyableResolutionException: WELD-001480: Bean type class org.gitlab4j.api.GitLabApi is not proxyable because it contains a final method public final org.gitlab4j.api.GitLabApi org.gitlab4j.api.GitLabApi.duplicate() - Producer Method [GitLabApi] with qualifiers [@Any @Default] declared as [[BackedAnnotatedMethod] @Produces @ApplicationScoped public org.ndx.agile.architecture.gitlab.GitLabProducer.initialize(@ConfigProperty String, @ConfigProperty String)].
	at org.jboss.weld.util.Proxies.getUnproxyableClassException(Proxies.java:223)
	at org.jboss.weld.util.Proxies.getUnproxyableTypeException(Proxies.java:178)
	at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:397)
	... 17 more

There must be something to change, no?