Signed up for what "passport" and who provided the virtual machine? The message is quite a generic one and just means that some XHR / AJAX request was performed where the response code was 404. Can you provide information from your browser tools network tab, i.e. which HTTP request failed with 404?
I think "passport" refers to one of the Alfresco training packages and so the Alfresco training folks probably provided the VM.
My assumptions as well, but better be safe and ask... Also because I would be surprised if they use a Community addon for the official training.
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