Hi, I'm trying to install a new self-hosted engine 4.5.0 on an upgraded gluster v10.1, but the deployment fails at the domain activation stage, with this error: [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Activate storage domain] [ ERROR ] ovirtsdk4.Error: Fault reason is "Operation Failed". Fault detail is "[]". HTTP response code is 400. Looking at the server.log in the engine I see the follwing error: 2022-04-25 00:55:58,266+02 ERROR [org.jboss.resteasy.resteasy_jaxrs.i18n] (default task-1) RESTEASY002010: Failed to execute: javax.ws.rs.WebApplicationException: HTTP 404 Not Found at org.ovirt.engine.api.restapi-jaxrs//org.ovirt.engine.api.restapi.resource.BaseBackendResource.handleError(BaseBackendResource.java:236) at org.ovirt.engine.api.restapi-jaxrs//org.ovirt.engine.api.restapi.resource.BackendResource.getEntity(BackendResource.java:119) at org.ovirt.engine.api.restapi-jaxrs//org.ovirt.engine.api.restapi.resource.BackendResource.getEntity(BackendResource.java:99) at org.ovirt.engine.api.restapi-jaxrs//org.ovirt.engine.api.restapi.resource.AbstractBackendSubResource.performGet(AbstractBackendSubResource.java:34) at org.ovirt.engine.api.restapi-jaxrs//org.ovirt.engine.api.restapi.resource.AbstractBackendSubResource.performGet(AbstractBackendSubResource.java:30) at org.ovirt.engine.api.restapi-jaxrs//org.ovirt.engine.api.restapi.resource.BackendAttachedStorageDomainResource.get(BackendAttachedStorageDomainResource.java:35) at org.ovirt.engine.api.restapi-definition//org.ovirt.engine.api.resource.AttachedStorageDomainResource.doGet(AttachedStorageDomainResource.java:81) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) The gluster volume itself is working fine and has the storage uid/gid set to 36 as it should be, and if I use a server with gluster 8 the installation works, while it fails with gluster 10 servers. Any help is appreciated, thanks, Alessandro