ok, I think I have an error I can do something with now:

{"WFLYCTL0062: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-1" => {
"WFLYCTL0412: Required services that are not installed:" => ["jboss.jdbc-driver.deployment_mariadb-java-client-2_6_0_jar"],
"WFLYCTL0180: Services with missing/unavailable dependencies" => [
"jboss.driver-demander.java:/MySqlDS is missing [jboss.jdbc-driver.deployment_mariadb-java-client-2_6_0_jar]",
"org.wildfly.data-source.MySqlDS is missing [jboss.jdbc-driver.deployment_mariadb-java-client-2_6_0_jar]"
]
}}}