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What COULD be wrong? Without any actual error messages? The VM is powered off so the the replicas are stopped. Your browser has bad cache and you need to clear it, or use a private window.

I deleted all images and downloaded again and now it works. So I would say Longhorn corruption?

So I would say Longhorn corruption?

I wouldn't say that. It doesn't seem like those things are related, but stranger things have happened. Images != Disks and afaik only Disks have replicas.