Hi there. This is a known issue currently being investigated.
[url=https://www.bungie.net/en/Forums/Post/260330787?sort=0&page=0]Season of the Lost & 30th Anniversary Known issues/Vital Info[/url] - Updated Jan 20
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The only information in the link you provided says. "We are investigating an increase in Marmot error's."..........That's it, and that's not even listed under Console, Just Error Codes. In the meantime my purchased copy of Destiny 2 and my paid DLC are currently unplayable. Its been 8 days since your reply and the game is still unplayable.
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I'm afraid that's the only information they've given. Check the Bungie.net weekly TWABs on Thursdays for any new information about planed patches or workaround instructions for the Marmot error.