Dear Community, I hope, you can guide me to solve this error or I can assist in solving a bug: RBD-Images are not shown in my Dashbord. - When accessing the dashboard page (block -> images) no images were listed and the error "Failed to execute RBD [errno 19] error generating diff from snapshot None" is shown. - When asking for the list via cli by "rbd ls" the test-image is shown. - There are no snapshots listed when asking for "rbd snap ls --all test". - Back to the ui: I can create and use a new image via UI, this will be shown via cli, but not in the ui. - The cluster manages several RBD, RGW and Cephfs pools successfully with ~13TiB used capacity out of ~18TiB. **Environment details** - Ceph-Cluster with 7 Debian 12 nodes and 3 Ubuntu 22.04 nodes at latest patch level. - Cluster-Version: 18.2.2 (531c0d11a1c5d39fbfe6aa8a521f023abf3bf3e2) reef (stable). - Error persists since Quincy. - Orchestrator: cephadm. - Dashboard is accessed via haproxy, but it's the same behavior when accessing it directly via ip. - All nodes are updated and rebooted. - Dashboard was removed and reactivated. **Steps to reproduce ** I need your help to find the root cause. **Logs** Health status is ok. I can't find useful logs except the attached error message shown in the Dashboard ("ailed to execute RBD [errno 19] error generating diff from snapshot None"). Do you have an idea, where to search for further useful logs? Last but not least: Thanks for this great piece of software! All the best Max