Yes, it told me it expected that too. But I had to ctrl+click or shift+click to pick it up.
And when I picked it up the objective was still there. I restarted the demo multiple times and this still happend.
I had the iron plates in my inventory, but the objective still told me to check out the ...

I'm trying to complete the first objective, i.e. finding something useful in the ship wreck. I am playing the demo btw.

I go to the ship wreck and pick up the 8 iron plates using ctrl+left click, this is the only thing I can find among all the pieces of ship wreck.
After that the objective is still ...