Recently upgraded from DevTest 10.4.0 to 10.6.0.

We are unable to start IAM, getting this error in the server.log:

Seeing this error in the server.log with a reference to an LDAP group not being able to be found:

2020-07-09 10:36:54,338 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 50) MSC000001: Failed to start service jboss.undertow.deployment.default-server.default-host./auth: org.jboss.msc.service.StartException in service jboss.undertow.deployment.default-server.default-host./auth: java.lang.RuntimeException: RESTEASY003325: Failed to construct public org.keycloak.services.resources.KeycloakApplication(javax.servlet.ServletContext,org.jboss.resteasy.core.Dispatcher)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:84)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
 at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 at java.lang.Thread.run(Thread.java:748)
 at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.RuntimeException: RESTEASY003325: Failed to construct public org.keycloak.services.resources.KeycloakApplication(javax.servlet.ServletContext,org.jboss.resteasy.core.Dispatcher)
 at org.jboss.resteasy.core.ConstructorInjectorImpl.construct(ConstructorInjectorImpl.java:162)
 at org.jboss.resteasy.spi.ResteasyProviderFactory.createProviderInstance(ResteasyProviderFactory.java:2298)
 at org.jboss.resteasy.spi.ResteasyDeployment.createApplication(ResteasyDeployment.java:340)
 at org.jboss.resteasy.spi.ResteasyDeployment.start(ResteasyDeployment.java:253)
 at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.init(ServletContainerDispatcher.java:120)
 at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.init(HttpServletDispatcher.java:36)
 at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:117)
 at org.wildfly.extension.undertow.security.RunAsLifecycleInterceptor.init(RunAsLifecycleInterceptor.java:78)
 at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:103)
 at io.undertow.servlet.core.ManagedServlet$DefaultInstanceStrategy.start(ManagedServlet.java:250)
 at io.undertow.servlet.core.ManagedServlet.createServlet(ManagedServlet.java:133)
 at io.undertow.servlet.core.DeploymentManagerImpl$2.call(DeploymentManagerImpl.java:565)
 at io.undertow.servlet.core.DeploymentManagerImpl$2.call(DeploymentManagerImpl.java:536)
 at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
 at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
 at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
 at io.undertow.servlet.core.DeploymentManagerImpl.start(DeploymentManagerImpl.java:578)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:100)
 at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:81)
 ... 6 more
Caused by: java.lang.RuntimeException: Unable to find group specified by path: /entAdmin
 at org.keycloak.models.utils.RepresentationToModel.createUser(RepresentationToModel.java:1488)
 at com.ca.ad.sv.keycloak.ext.updater.IAMUpdateHandler.lambda$updateRealm$4(IAMUpdateHandler.java:124)
 at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
 at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
 at com.ca.ad.sv.keycloak.ext.updater.IAMUpdateHandler.updateRealm(IAMUpdateHandler.java:124)
 at com.ca.ad.sv.keycloak.ext.updater.IAMUpdater.lambda$importRealm$0(IAMUpdater.java:55)
 at org.keycloak.models.utils.KeycloakModelUtils.runJobInTransaction(KeycloakModelUtils.java:227)
 at com.ca.ad.sv.keycloak.ext.updater.IAMUpdater.importRealm(IAMUpdater.java:38)
 at org.keycloak.exportimport.dir.DirImportProvider.importModel(DirImportProvider.java:79)
 at com.ca.ad.sv.keycloak.ext.updater.IAMUpdater.importModel(IAMUpdater.java:32)
 at org.keycloak.exportimport.ExportImportManager.runImport(ExportImportManager.java:87)
 at org.keycloak.services.resources.KeycloakApplication.migrateAndBootstrap(KeycloakApplication.java:231)
 at org.keycloak.services.resources.KeycloakApplication$1.run(KeycloakApplication.java:146)
 at org.keycloak.models.utils.KeycloakModelUtils.runJobInTransaction(KeycloakModelUtils.java:227)
 at org.keycloak.services.resources.KeycloakApplication.<init>(KeycloakApplication.java:137)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
 at org.jboss.resteasy.core.ConstructorInjectorImpl.construct(ConstructorInjectorImpl.java:150)
 ... 28 more