BUILD FAILED IN UNREAL 5.4

[GreenClover]

Didn’t work unfortunately. I do get a more helpful error either because of this change or because I’ve upgraded to 5.4.1:
“UnrealBuildTool has banned the MSVC 14.39.33519-14.39.99999 toolchains due to compiler issues.”
which lead me to this post:

Failure to create a new project: "cannot access private member declared in class 'FHazardPointerCollection::FHazardRecord'"

Hi, I’ve never worked with UE before, just installed UE 5.3.2. Trying to create a new project, I select “Games” - “First person”, then I select C++/Desktop/Scalable quality. I also ticked “Starter content”, and no raytracing. Now click “Create” - it works for a while and throws this compilation error. [image] Any advice?

and this VS issue:
https://developercommunity.visualstudio.com/t/VS-2022-1790-Preview-10-__builtin_arr/10519788

Seems like this problem has already started occurring in UE 5.3.2 but since we are upgrading from 5.3.1 to 5.4 (and 5.4.1) we’ve only noticed it now. The Visual Studio fix is allegedly present in the 17.10 preview version, but installing the 14.38 toolchain (by using the Visual Studio installer Modify Visual Studio workloads, components, & language packs | Microsoft Learn) also “fixes” the issue.