The required library hostfxr.dll does not contain the expected entry point. when executing Setup.bat of Unreal branch 5.5

[brs-sebascova]

Hello there @tsi6800!

Checking through the community, similar scenarios were encountered in other threads. The most succesful solution was to download and install DotNET 3.1 Download .NET Core 3.1 (Linux, macOS, and Windows) | .NET

For your scenario in particular, I would also suggest to delete and re-generate the files from GitDependencies folder, which includes hostfxr.dll

You can also check for more details in the following posts:

Can't open UE5 demo - "The required library hostfxr.dll could not be found"

Hi all, First, I got a message that the demo level couldn’t be opened with the current version of UE, so it made a copy… However, I’m unable to open the copy, as it still wants to duplicate it, and I get this error: Project files could not be generated. Log output: Running E:/UE_4.23/UE_5.0EA/Engine/Binaries/DotNET/UnrealBuildTool/UnrealBuildTool.exe -projectfiles -project=“F:/Unreal Engine Projects/UE5 Demo/ValleyoftheAncient 5.0 - 2/AncientGame.uproject” -game -rocket -progress A fatal e…

Missing hostfxr.dll (.NET Core Runtime) When Creating a UE5 Project

I get the following error when trying to create a new Unreal Engine 5 project. An error occurred while trying to generate project files. Running D:/Apps/Epic Games/UE_5.0EA/Engine/Binaries/DotNET/UnrealBuildTool/UnrealBuildTool.exe -projectfiles -project="D:/HD/Projects/Unreal Projects/AtlanticaWorlds/AtlanticaWorlds.uproject" -game -rocket -progress A fatal error occurred. The required library hostfxr.dll could not be found. If this is a self-contained application, that library should exist …