Installation of magnolia 5.3.4 throws the following exception when LDAPUserManager is registred.

1) Module instance for module [ldap] not available, most likely because the module has not yet been started. Inject a Provider<> instead to get access to the module instance when it's available.
at info.magnolia.objectfactory.guice.GuiceComponentConfigurationModule.bindProvider(GuiceComponentConfigurationModule.java:161)
while locating info.magnolia.jaas.sp.ldap.LDAPModule

1 error
com.google.inject.ProvisionException: Guice provision errors:

1) Module instance for module [ldap] not available, most likely because the module has not yet been started. Inject a Provider<> instead to get access to the module instance when it's available.
at info.magnolia.objectfactory.guice.GuiceComponentConfigurationModule.bindProvider(GuiceComponentConfigurationModule.java:161)
while locating info.magnolia.jaas.sp.ldap.LDAPModule

1 error
at com.google.inject.internal.InjectorImpl$4.get(InjectorImpl.java:987)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1013)
at info.magnolia.objectfactory.guice.GuiceComponentProvider.getComponent(GuiceComponentProvider.java:102)
at info.magnolia.objectfactory.Components.getComponent(Components.java:96)
at info.magnolia.jaas.sp.ldap.LDAPUtils.isAllowPartialResults(LDAPUtils.java:86)
at info.magnolia.jaas.sp.ldap.LDAPUserManager.getUser(LDAPUserManager.java:75)
at info.magnolia.cms.security.DelegatingUserManager$5.delegate(DelegatingUserManager.java:112)
at info.magnolia.cms.security.DelegatingUserManager$5.delegate(DelegatingUserManager.java:109)
at info.magnolia.cms.security.DelegatingUserManager.delegateUntilSupportedAndNotNull(DelegatingUserManager.java:190)
at info.magnolia.cms.security.DelegatingUserManager.getUser(DelegatingUserManager.java:109)
at info.magnolia.module.delta.AddRoleToUserTask.execute(AddRoleToUserTask.java:57)
at info.magnolia.module.delta.ConditionalDelegateTask.execute(ConditionalDelegateTask.java:61)
at info.magnolia.module.ModuleManagerImpl.applyDeltas(ModuleManagerImpl.java:514)
at info.magnolia.module.ModuleManagerImpl.installOrUpdateModule(ModuleManagerImpl.java:496)
at info.magnolia.module.ModuleManagerImpl$1.doExec(ModuleManagerImpl.java:274)
at info.magnolia.context.MgnlContext$VoidOp.exec(MgnlContext.java:414)
at info.magnolia.context.MgnlContext$VoidOp.exec(MgnlContext.java:411)
at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:385)
at info.magnolia.module.ModuleManagerImpl.performInstallOrUpdate(ModuleManagerImpl.java:268)
at info.magnolia.module.ui.ModuleManagerWebUI$2.run(ModuleManagerWebUI.java:124)
at java.lang.Thread.run(Thread.java:745)

LDAPUtils tries to resolve the LDAPModule. But the LDAPModule is not available at this time. There is a null check in LDAPUtils but the Provider throws an exception if the module could be resolved. IMHO the result could never be null.