Completing the conflux if not done before today does not unlock access to it as a legendary lost sector.
(I am definitely high enough LL as I was doing yesterday LLS)
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Did you do the other 2 LS on nessus? They must all be cleared before they appear as legend
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Was having the same issue. I went to do a different lost sector on Nessus and as soon as I entered the Conflux popped up
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