Hi Tim Herman,
Thank you for your patience.
We sincerely apologize for any inconvenience you experienced in accessing the sandbox.
While we are committed to keeping you informed of any updates as they become available, we recommend a workaround for the time being. We suggest signing up for an Azure free account through the provided link: https://azure.microsoft.com/en-us/free, where you can create a sandbox environment.
For guidance on running Microsoft Learn training exercises in your own subscription, please refer to this link: https://learn.microsoft.com/en-us/training/support/use-your-own-subscription.
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