WildFly 14.0.1 Embedded Server fails to boot

Issue description as reported at https://github.com/emmartins/wildfly-server-migration/issues/10#issuecomment-420669457 :

"2018-09-12 16:25:38,137 ERROR [logger] Migration failed: org.jboss.migration.core.ServerMigrationFailureException: java.lang.IllegalStateException: WFLYEMB0018: Cannot get reflective method 'create' for: org.wildfly.core.embedded.EmbeddedStandaloneServerFactory at org.jboss.migration.core.task.TaskExecutionImpl.run(TaskExecutionImpl.java:174) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.execute(TaskExecutionImpl.java:159) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskContextImpl.execute(TaskContextImpl.java:68) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskContextImpl.execute(TaskContextImpl.java:32) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.task.ServerConfigurationsMigration$Task.migrateConfig(ServerConfigurationsMigration.java:151) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.task.ServerConfigurationsMigration$Task.migrateAllConfigs(ServerConfigurationsMigration.java:120) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.task.ServerConfigurationsMigration$Task.run(ServerConfigurationsMigration.java:105) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.run(TaskExecutionImpl.java:169) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.execute(TaskExecutionImpl.java:159) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskContextImpl.execute(TaskContextImpl.java:68) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskContextImpl.execute(TaskContextImpl.java:32) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.task.StandaloneServerMigration$1.run(StandaloneServerMigration.java:61) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.console.UserConfirmationServerMigrationTask.runTask(UserConfirmationServerMigrationTask.java:58) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.console.UserConfirmationServerMigrationTask.confirmTaskRun(UserConfirmationServerMigrationTask.java:50) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.console.UserConfirmationServerMigrationTask.run(UserConfirmationServerMigrationTask.java:63) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.env.SkippableByEnvServerMigrationTask.run(SkippableByEnvServerMigrationTask.java:47) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.run(TaskExecutionImpl.java:169) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.execute(TaskExecutionImpl.java:159) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskContextImpl.execute(TaskContextImpl.java:68) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskContextImpl.execute(TaskContextImpl.java:32) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.task.ServerMigration.run(ServerMigration.java:45) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.WildFlyServer10.migrate(WildFlyServer10.java:40) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.ServerMigration$1.run(ServerMigration.java:153) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.run(TaskExecutionImpl.java:169) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.ServerMigration.run(ServerMigration.java:160) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.cli.CommandLineServerMigration.main(CommandLineServerMigration.java:131) [jboss-server-migration-cli-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] Caused by: java.lang.IllegalStateException: WFLYEMB0018: Cannot get reflective method 'create' for: org.wildfly.core.embedded.EmbeddedStandaloneServerFactory at org.wildfly.core.embedded.EmbeddedProcessFactory.createStandaloneServer(EmbeddedProcessFactory.java:180) [wildfly-embedded-5.0.0.Final.jar:5.0.0.Final] at org.wildfly.core.embedded.EmbeddedProcessFactory.createStandaloneServer(EmbeddedProcessFactory.java:116) [wildfly-embedded-5.0.0.Final.jar:5.0.0.Final] at org.jboss.migration.wfly10.config.management.impl.EmbeddedStandaloneServerConfiguration.startConfiguration(EmbeddedStandaloneServerConfiguration.java:87) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.management.impl.AbstractManageableServerConfiguration.start(AbstractManageableServerConfiguration.java:70) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.wfly10.config.task.ServerConfigurationMigration$1.run(ServerConfigurationMigration.java:96) [jboss-server-migration-wildfly10.0-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] at org.jboss.migration.core.task.TaskExecutionImpl.run(TaskExecutionImpl.java:169) [jboss-server-migration-core-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT] ... 25 more Caused by: java.lang.NoSuchMethodException: org.wildfly.core.embedded.EmbeddedStandaloneServerFactory.create(java.io.File, org.jboss.modules.ModuleLoader, java.util.Properties, java.util.Map, [Ljava.lang.String at java.lang.Class.getMethod(Class.java:1786) [rt.jar:1.8.0_181] at org.wildfly.core.embedded.EmbeddedProcessFactory.createStandaloneServer(EmbeddedProcessFactory.java:178) [wildfly-embedded-5.0.0.Final.jar:5.0.0.Final] ... 30 more"