I used a gnawing hunger and got it done. P.S: don't use ricochet rounds

This is a known bug at the minute. The puzzles aren’t working correctly, and in some cases even when you’ve got the right solution, it isn’t clicking in. Loads of people reporting problems with the puzzles in the forums, so it looks pretty wide spread. Hopefully a fix will be out soon! Edit: although I have read that people are able to make progress on the puzzles using Extraordinary Rendition for whatever reason 🤷

Try pulse rifle. It seems glitched when using other types of guns. I think it might caused by poor internet connection.