Hard to say - you've told us "my account doesn't have access", but that could be paraphrasing all sorts of different error messages.
Could you tell us what you have clicked on (not the exact link, just a description of what in Confluence you've hit and what sort of page you are on - the attachments for a page for example, or a content page with a link to download on it), and what the actual error message is (again, no need for exact urls, just the words the error message says)
Ok, you have to remember that this community is mostly here to talk about Atlassian because we use one or more Atlassian systems. Most of us don't know what Altair might be (my first thought is one of the brightest stars in our sky).
But we can get you a bit further - you'll need to sign up for an accoun, ask the admins of altairsemi.atlassian.net to add you to their system, or ask the admins to make it anonymously accessible so you can grab the attachment without logging in.
Phew, Atlassian Team 2021 blew by. With dozens of demos and a handful of keynotes, you may have missed some of the awesome Confluence Cloud sessions. Don't' worry, you can watch them all here or on Y...
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