At the part of the quest where I need to build 4 actuators at Boston Airport. However, the workshop will not let me build these items or anything else even though I have all the necessary components.

Bug or am I doing something wrong?

Using PS4.

Have you activated the workshop? I know it's a stupid question, but I made that mistake at one of my settlements. I tried to go in to Workshop mode and couldn't (just kept going from 1st to 3rd and back) and then I realized when I walked over to the workshop that I'd never activated it. Uh D'uh!

Yes, I have activated the workshop and have built beds and other items on previous visits. Now I cannot build anything.

I'm not finding anything about that issue or any complaints or advice other than you must complete "Shadow of Steel" and have visited the Prydwen before you can use it, which I assume you have already since you're on LIberty Prime. I'm sure that other forumers may have other info.

Ok, what you are trying to build, will not go into your inventory. They are big huge hunks of metal that you have to place on the ground like the beds you mentioned.

Also, I have a question. Each settlement has a build limit, Boston Airport is no exception. You haven't by chance reached that limit, have you?

I was trying to build items while standing at the workstation. When I moved away I was able to build any item. Thank for the tip.

I have built very little at the Boston Airport.

can you stop putting spoilers into these forums?

even the title of the thread is a major one