This may be the same issue as described here: https://lists.ovirt.org/archives/list/users@ovirt.org/thread/CJISJIDQKSIN... https://bugzilla.redhat.com/show_bug.cgi?id=1977276 I am on 4.4.8.6-1.el8, installed a couple days ago from the ovirt node ISO. In particular, I noticed if I SSH into the hosted engine and tail -f /var/log/ovirt-imageio/daemon.log, in the failure case I get something like: 2021-09-30 08:15:52,330 INFO (Thread-8) [http] OPEN connection=8 client=::ffff:192.168.1.53 2021-09-30 08:16:23,315 INFO (Thread-8) [http] CLOSE connection=8 client=::ffff:192.168.1.53 [connection 1 ops, 30.984947 s] [dispatch 1 ops, 0.000097 s] No activity in tail -f /var/log/ovirt-imageio/daemon.log on the host (I only have one host) in the failure case, just the engine. In the success case, there is activity in both logs. It is very intermittent. Sometimes uploads work most of the time (maybe 4 out of 5), and I've had other times that uploads do not work at all (0 out of 5). I think when it's behaving particularly badly, restarting the engine (hosted-engine --vm-shutdown, then hosted-engine --vm-start) helps, but I haven't figured out a reliable pattern. (I am logged in as admin.) I've tried several browsers, closing/reopening the browser, etc. Hoping this info will help in tracking it down.