My recommendation is to re-install 9.0.0, do not reboot and try it again.
There just appears to be some logic that is looking for the 9.0.0 and it does not see it.
While I do not disagree and see that 9.0.0 is installed, just humor us and click the "reinstall" link, and then try your upgrade to 9.0.3.
At least it will be 1 troubleshooting step out of the way.
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