当我尝试在vscode中打开一个unity脚本时，我得到一个错误消息Some projects have trouble loading. Please review the output for more details.。当我选择Show Output时，我得到以下输出：

Starting OmniSharp server at 7/5/2022, 6:09:26 PM
    Target: /Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/First Unity Game.sln

OmniSharp server started with .NET 6.0.301
.
    Path: /Users/angelalindsay/.vscode/extensions/ms-dotnettools.csharp-1.25.0-darwin-x64/.omnisharp/1.39.0-net6.0/OmniSharp.dll
    PID: 2949

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on Unknown 0.0 (Unknown)
[info]: OmniSharp.Services.DotNetCliService
        Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK
[info]: OmniSharp.Services.DotNetCliService
        Using the 'dotnet' on the PATH.
[info]: OmniSharp.Services.DotNetCliService
        DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: .NET Core SDK 6.0.301 17.2.0 - "/usr/local/share/dotnet/sdk/6.0.301/"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: .NET Core SDK 6.0.301 17.2.0 - "/usr/local/share/dotnet/sdk/6.0.301/"
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
[info]: OmniSharp.MSBuild.ProjectSystem
        Detecting projects in '/Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/First Unity Game.sln'.
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assembly-CSharp.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Did not find any CSX files
[info]: OmniSharp.WorkspaceInitializer
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location '/Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game' on host 2915.
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assembly-CSharp.csproj
[fail]: OmniSharp.MSBuild.ProjectLoader
        This project targets .NET version that requires reference assemblies that are not installed (e.g. .NET Framework). The most common solution is to make sure Mono is fully updated on your machine (https://mono-project.com/download/) and that you are running the .NET Framework build of OmniSharp (e.g. 'omnisharp.useModernNet': false in C# Extension for VS Code).
[warn]: OmniSharp.MSBuild.ProjectManager
        Failed to load project file '/Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assembly-CSharp.csproj'.
/Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assembly-CSharp.csproj
/usr/local/share/dotnet/sdk/6.0.301/Microsoft.Common.CurrentVersion.targets(1221,5): Error: This project targets .NET version that requires reference assemblies that are not installed (e.g. .NET Framework). The most common solution is to make sure Mono is fully updated on your machine (https://mono-project.com/download/) and that you are running the .NET Framework build of OmniSharp (e.g. 'omnisharp.useModernNet': false in C# Extension for VS Code).

[fail]: OmniSharp.MSBuild.ProjectManager
        Attempted to update project that is not loaded: /Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assembly-CSharp.csproj
[warn]: OmniSharp.Roslyn.CSharp.Services.InlayHints.InlayHintService
        Inlay hints requested for document not in workspace Location { FileName = /Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assets/Scripts/WayPointFollower.cs, Range = Range { Start = Point { Line = 0, Column = 0 }, End = Point { Line = 21, Column = 0 } } }
[warn]: OmniSharp.Roslyn.CSharp.Services.InlayHints.InlayHintService
        Inlay hints requested for document not in workspace Location { FileName = /Users/angelalindsay/Desktop/Unity Projects/First Unity Game/First Unity Game/Assets/Scripts/WayPointFollower.cs, Range = Range { Start = Point { Line = 0, Column = 0 }, End = Point { Line = 21, Column = 0 } } }

我不知道这是不是相关的，但是，统一的自动完成在vscode中也不工作。我可以输入代码，它在统一中工作，但我想有自动完成，并摆脱这个错误消息。我可以修复这个问题吗？谢谢。