Hi Mike Jackman,
As you are getting "Azure Local Network - Check network requirements" validation task fails you can go through the "Recommended resolution" from the below link if you still face the same issue do let us know
https://learn.microsoft.com/en-us/azure/azure-local/manage/troubleshoot-deployment?view=azloc-2504#recommended-resolution
Feel free to reach out if you have any further queries.
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Thank You.