1. pulled latest origin master from github
2. built it via mvn clean install
3. run it.
a) WF used from galeon
b) downloaded zip from wildfly.org

both have same result:
Retrieving servers...
INFO SOURCE server name: WildFly Full, version: 18.0.1.Final.
java.lang.IllegalArgumentException: WFCMTOOL000006: Failed to retrieve server TARGET, from base dir d:\ide\wildfly\wildfly-19.0.0.Final.
at org.jboss.migration.core.ServerMigration.getServer(ServerMigration.java:186)
at org.jboss.migration.core.ServerMigration.run(ServerMigration.java:134)
at org.jboss.migration.cli.CommandLineServerMigration.main(CommandLineServerMigration.java:131)

So I will debug it and resaon is in WildFlyFullServerProvider10_0 class that is parent for WildFly19_0ServerProvider class in method getProductInfo().

This method search for module: org.jboss.as.product:wildfly-full
but in distribution is org.jboss.as.product:main