Unreal Engine 5.1 Released

I’m getting the following error when trying to generate project files for my 5.0.3 C++ project:

Binding IntelliSense data… 100%
Writing project files…
Writing project files… 0%
Unhandled exception: System.OutOfMemoryException: Exception of type ‘System.OutOfMemoryException’ was thrown.
at System.GC.AllocateNewArray(IntPtr typeHandle, Int32 length, GC_ALLOC_FLAGS flags)
at System.GC.g__AllocateNewUninitializedArray|66_0[T](Int32 length, Boolean pinned)
at System.Text.StringBuilder.ExpandByABlock(Int32 minBlockCharCount)
at System.Text.StringBuilder.Append(Char value, Int32 repeatCount)
at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.Text.StringBuilder.AppendFormat(String format, Object[] args)
at UnrealBuildTool.VCProjectFile.WriteProjectFile(List1 InPlatforms, List1 InConfigurations, PlatformProjectGeneratorCollection PlatformProjectGenerators, ILogger Logger) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\VisualStudio\VCProject.cs:line 1257
at UnrealBuildTool.ProjectFileGenerator.WriteProjectFiles(PlatformProjectGeneratorCollection PlatformProjectGenerators, ILogger Logger) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\ProjectFileGenerator.cs:line 2812
at UnrealBuildTool.VCProjectFileGenerator.WriteProjectFiles(PlatformProjectGeneratorCollection PlatformProjectGenerators, ILogger Logger) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\VisualStudio\VCProjectFileGenerator.cs:line 480
at UnrealBuildTool.ProjectFileGenerator.GenerateProjectFiles(PlatformProjectGeneratorCollection PlatformProjectGenerators, String[] Arguments, ILogger Logger) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\ProjectFiles\ProjectFileGenerator.cs:line 1176
at UnrealBuildTool.GenerateProjectFilesMode.Execute(CommandLineArguments Arguments, ILogger Logger) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\GenerateProjectFilesMode.cs:line 233
at UnrealBuildTool.UnrealBuildTool.Main(String[] ArgumentsArray) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 648

I can generate 5.03 project files without any issues. This only happens with 5.1. I am using VS Community 2022. Windows 10.

Any idea what might be causing this issue? Thanks!

Edit: I’ve just tried creating a new blank 5.1 C++ project and I am getting the same error.

Is anyone able to create a new C++ project with 5.1?

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