The Old Guard enemies appear but not clue

This mission still has a bug for me. The enemies now appear after the update, but there is no clue. Been inside the readiness bunker and everywhere around. What is the clue I am looking for>?

Just a heads up @MrJinx, if you want to write a spoiler, you can write it under “options” (cogwheel) and then “Hide Details”. The format looks like this:

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