Yeah it annoyed me as I noticed it and did almost everything else to fix it and failed for 3 hours, two days later I took another shot and it was like a duh moment.
I've sent a PR to that plugin should be good after its merged and republished.
I pressed the button "Mark all notifications read" but the notice still active.
It is necessary to update the page.
@Paweł-Nowak You should register for an account on Transifex. Then you can contribute translations to NodeBB for everybody to enjoy 🙂
It does not require coding whatsoever 👍