Building Unreal from source and using Setup.bat on UE 5.5

Development Platform & Builds
1

Error when starting out Setup.bat to download additional Engine dependencies to open project.

I have .NET 8.0 installed, pretty much everything up to date, can’t figure out why I get this error when I have everything required.

Checking dependencies...
Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.Security.Cryptography, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'System.Security.Cryptography, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at GitDependencies.Program.ComputeHashForFile(String FileName)
   at GitDependencies.Program.UpdateWorkingTree(Boolean bDryRun, String RootPath, HashSet`1 ExcludeFolders, Int32 NumThreads, Double HttpTimeoutMultiplier, Int32 MaxRetries, Uri Proxy, OverwriteMode Overwrite, String CachePath, Single CacheSizeMultiplier, Int32 CacheDays)
   at GitDependencies.Program.Main(String[] Args)

Thanks for any help and input to that!

1 Like
2

An environment variable %DOTNET_ROOT% is required to set to the correct path like C:\Program Files\dotnet

3

Tried adding this, but I have the same error. @mr.kubstoff Did you solve this?

4

Solved this by deleting the Engine\Binaries\DotNET folder of my project and copy the official one from Epic’s repo. Running again the Setup.bat after this worked without any error