[standalone@localhost:9990 /] /core-service=management/management-interface=http-interface:read-resource-description
...
 "console-enabled" => {
                "type" => BOOLEAN,
                "description" => "Flag that indicates admin console is enabled",
                "expressions-allowed" => true,
                "required" => false,
                "nillable" => true,
                "default" => true,
                "access-type" => "read-write",
                "storage" => "configuration",
                "restart-required" => "all-services"
            },

...

[standalone@localhost:9990 /] /core-service=management/management-interface=http-interface:write-attribute(name=console-enabled, value=${my.var:true})
{
    "outcome" => "failed",
    "failure-description" => "WFLYCTL0086: Failed to persist configuration change: WFLYCTL0084: Failed to marshal configuration",
    "rolled-back" => true
}

17:36:35,971 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 1) WFLYCTL0008: Failed to persist configuration change: org.jboss.as.controller.persistence.ConfigurationPersistenceException: WFLYCTL0084: Failed to marshal configuration
	at org.jboss.as.controller.persistence.AbstractFilePersistenceResource.<init>(AbstractFilePersistenceResource.java:53)
	at org.jboss.as.controller.persistence.ConfigurationFilePersistenceResource.<init>(ConfigurationFilePersistenceResource.java:46)
	at org.jboss.as.controller.persistence.BackupXmlConfigurationPersister.store(BackupXmlConfigurationPersister.java:120)
	at org.jboss.as.controller.ModelControllerImpl.writeModel(ModelControllerImpl.java:728)
	at org.jboss.as.controller.OperationContextImpl.createPersistenceResource(OperationContextImpl.java:535)
	at org.jboss.as.controller.AbstractOperationContext.executeDoneStage(AbstractOperationContext.java:821)
	at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:770)
	at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:468)
	at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1415)
	at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:431)
	at org.jboss.as.controller.ModelControllerImpl.lambda$execute(ModelControllerImpl.java:248)
	at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:304)
	at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:270)
	at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:248)
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.doExecute(ModelControllerClientOperationHandler.java:240)
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.access(ModelControllerClientOperationHandler.java:138)
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.run(ModelControllerClientOperationHandler.java:162)
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.run(ModelControllerClientOperationHandler.java:158)
	at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:328)
	at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:285)
	at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:254)
	at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:225)
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.execute(ModelControllerClientOperationHandler.java:158)
	at org.jboss.as.protocol.mgmt.ManagementRequestContextImpl.doExecute(ManagementRequestContextImpl.java:70)
	at org.jboss.as.protocol.mgmt.ManagementRequestContextImpl$AsyncTaskRunner.run(ManagementRequestContextImpl.java:160)
	at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
	at java.lang.Thread.run(Thread.java:748)
	at org.jboss.threads.JBossThread.run(JBossThread.java:513)
Caused by: org.jboss.as.controller.persistence.ConfigurationPersistenceException: WFLYCTL0089: Failed to write configuration
	at org.jboss.as.controller.persistence.AbstractConfigurationPersister.marshallAsXml(AbstractConfigurationPersister.java:112)
	at org.jboss.as.controller.persistence.AbstractFilePersistenceResource.<init>(AbstractFilePersistenceResource.java:46)
	... 30 more
Caused by: java.lang.IllegalArgumentException
	at org.jboss.dmr.ModelValue.asBoolean(ModelValue.java:73)
	at org.jboss.dmr.ModelNode.asBoolean(ModelNode.java:337)
	at org.jboss.as.server.parsing.StandaloneXml_15.writeHttpManagementProtocol(StandaloneXml_15.java:975)
	at org.jboss.as.domain.management.parsing.ManagementXml_5.writeManagementInterfaces(ManagementXml_5.java:2458)
	at org.jboss.as.domain.management.parsing.ManagementXml_5.writeManagement(ManagementXml_5.java:2020)
	at org.jboss.as.server.parsing.StandaloneXml_15.writeContent(StandaloneXml_15.java:757)
	at org.jboss.as.server.parsing.StandaloneXml.writeContent(StandaloneXml.java:148)
	at org.jboss.as.server.parsing.StandaloneXml.writeContent(StandaloneXml.java:52)
	at org.jboss.staxmapper.XMLMapperImpl.doDeparse(XMLMapperImpl.java:96)
	at org.jboss.staxmapper.XMLMapperImpl.deparseDocument(XMLMapperImpl.java:91)
	at org.jboss.as.controller.persistence.AbstractConfigurationPersister.marshallAsXml(AbstractConfigurationPersister.java:106)
	... 31 more