Hi,
On recommendation I have upgraded our project to the latest beta version, after installing, importing and recompilling I am now getting the following namespace related errors, I can’t update our core project until I can get these resolved, the errors are in the image provided as to many to copy paste to here.
Thanks in advance to any help to resolve this 
Hi
That looks like a potentially corrupt C# project file. Try to get unity to regenerate it (should be doable by deleting the original project file, Unity will then re-create it).
Hi,
I just deleted these files:
Assembly-CSharp.csproj
Assembly-CSharp-Editor.csproj
AstarPathfindingProject.csproj
AstarPathfindingProjectEditor.csproj
unfortunatelly after regenerating and reimporting everything those 22 errors still remain, are there any other files I need to delete?
Thanks
Hi
I suspect some package manager dependency is not being met. Which version of Unity are you using?
We are using Unity 2021.1.16
Odd. I tried to install it to an empty 2021.1.0 project, and it works fine.
Are you sure there are no earlier errors?