Unity 2021 VS can't find Astar scripts

Hello, I’m using Unity 2021 Visual Scripting.
It seems to me that my problem is in the unity, but nevertheless I want to ask just in case here.
I added Astar using Unity 2020 Bolt and everything works well.
But 2021 VS does not see the scripts. And when you try to find the script, it simply cannot be found.

Hi

Try to delete your .csproj files. Unity sometimes doesn’t rebuild them when necessary.