Error on build newest source

[VnHoangAnh]

I encounter this error on building new source
Severity Code Description Project File Line Suppression State Error CS0246 The type or namespace name 'Hash' could not be found (are you missing a using directive or an assembly reference?) CitizenFX.Core fivem\code\client\clrcore-v2\Native\CustomNativeWrapper.cs 20 Active
Anyone encounter this? How to build with new mono?

[devnull9090]

I am also having this issue, did you find a solution?