You will need to post your Fusion 360 log files. If you do not know how to collect them, take a look at this article.
John Hackney, Retired
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I thought these were added yesterday. Sorry
@Silvmdg01 Are you launching from a desktop shortcut? If so, can you try this:
My guess based on your logs is that your shortcut is stuck launching an older version of Fusion but the newer update has already downloaded and is not being launched, so it fails to recognize that an update is available.