When we import Unity Ai Package then ZString start throwing errors

[kenofori]

Hi,

When i import Unity Ai Package in 6.4 then ZString start throwing compilation errors like these
Library/PackageCache/com.cysharp.zstring@3c95e5ef4874/Utf8ValueStringBuilder.cs(436,29): error CS0103: The name 'Unsafe' does not exist in the current context

Please advise