There are multiple use cases that are causing progression issues with this - but I wanted to share a fix that worked for a couple folks in case it can help you.
If you crashed out/disconnected during the mission 'Finding Old Friends' it can cause your plot data to be incorrect. This can result in you not having access to the Challenges.
To fix, try joining a Quickplay instance of the 'Finding Old Friends' mission and re-complete it.
This will likely NOT fix the issue where your challenges are marked as complete and you still can't access the tombs (no interact point).
If you got the tombs quest properly, but your journal is saying you have the challenges completed - but the Door says you are still unworthy - make sure you check the challenges in the challenges tab. There’s a chance you still haven’t completed them, and that there is a bug in the journal.
We are still actively reviewing people's server data to troubleshoot why this is happening.
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