I built a new Sophos UTM. I built a new VPN. It is routing my VPN traffic with no issues. Today it discovered that there were updates. I clicked "Update to latest version now". It rebooted and installed only 9.2. So, I clicked "Update to latest version now" again to install 9.3. It shows a ! for "Pre-installation checks" and never gets beyond this. I rebooted the box and tried to install again. No change. I am unable to install 9.3. What do you suggest?
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