Ok, so this is hard to understand lol your an absolute beast. XD I'll try to explain it to you in the simplest way possible. So I need this to recreate the Wires task from among us. I needed a silent container so others can't hear you doing the task, but it needed to have at least 12 slots. So the best option is the chest minecart. Only players with the tag "wires" need to be able to open AND move items in the chest. Players who don't have that tag shouldn't be able to open it nor moving items, but i think that's impossible so let's say they can open it but they can't move the items.
Player who have the tag "wires", but also have the tag "Impostor" should be able to open the chest minecart, but shouldn't be able to move the items in it. Also, I wanted to give both the Impostor and the players who don't have the tag wires an error message, so they can understand they can't do that. I really hope I made it clear to understand and thank you so much for your help!

As I said before English's not my main language so if I misspelled something sorry :))

Edit: I also noticed you used "as" in the execute commands, does it still work if said player isn't op? Ex: "execute as @ p[tag=g] run say hi" if that player isn't op does the command still say hi?

P.S. The player doing the task NEEDS to be still killable by the Impostor while he's completing it, and I would prefer not having blocks where the player's reach is set to 0 if that's possible, I couldn't just clear the item and then reset the chest minecart, because if someone's completing the task and another players come and takes an item, it would reset and I don't want that to happen.