Failed to load project file (under macOS Catalina)

Issue Description

I have an existing solution with about 7 projects inside. I’ve had no issues until lately with Omnisharp running so I can click around my functions to navigate between files. However this seems to have changed since macOS Catalina.

OmniSharp log

Post the output from Output-->OmniSharp log here

Failed to load project file '/Users/username/path/to/project/project.csproj'.
/Users/username/path/to/project.csproj(1,1)
Microsoft.Build.Exceptions.InvalidProjectFileException: The imported project "/Library/Frameworks/Mono.framework/Versions/5.2.0/lib/mono/xbuild/Current/Microsoft.Common.props" was not found. Also, tried to find "Current/Microsoft.Common.props" in the fallback search path(s) for $(MSBuildExtensionsPath) - "/Library/Frameworks/Mono.framework/External/xbuild/" . These search paths are defined in "/Users/username/.vscode/extensions/ms-vscode.csharp-1.21.7/.omnisharp/1.34.7/omnisharp/OmniSharp.exe.config". Confirm that the path in the <Import> declaration is correct, and that the file exists on disk in one of the search paths.  /usr/local/share/dotnet/sdk/2.2.402/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props

C# log

Post the output from Output-->C# here

None

Environment information

macOS version: 10.15.1 VSCode version: 1.40.1 C# Extension: 1.21.7

Mono Information

OmniSharp using built-in mono

Dotnet Information

.NET Core SDK (reflecting any global.json): Version: 2.2.402 Commit: c7f2f96116

Runtime Environment: OS Name: Mac OS X OS Version: 10.15 OS Platform: Darwin RID: osx.10.15-x64 Base Path: /usr/local/share/dotnet/sdk/2.2.402/

Host (useful for support): Version: 2.2.7 Commit: b1e29ae826

.NET Core SDKs installed: 2.2.100 [/usr/local/share/dotnet/sdk] 2.2.106 [/usr/local/share/dotnet/sdk] 2.2.301 [/usr/local/share/dotnet/sdk] 2.2.402 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.4 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
android-dev-ext	adelphes	0.8.0
atom-keybindings	ms-vscode	3.0.6
azure-account	ms-vscode	0.8.7
bower	donjayamanne	0.0.3
csharp	ms-vscode	1.21.7
Csharp-ASPNETCore	rahulsahay	1.11.0
debugger-for-chrome	msjsdiag	4.12.1
electron-debug	kodetech	18.11.1
gc-excelviewer	GrapeCity	2.1.32
githistory	donjayamanne	0.4.6
Go	ms-vscode	0.11.9
Gradle	cazzar09	1.1.2
html-snippets	abusaidm	0.2.1
material-icon-theme	PKief	3.9.1
mono-debug	ms-vscode	0.15.8
mssql	ms-mssql	1.7.0
node-debug2	ms-vscode	1.39.3
npm-intellisense	christian-kohler	1.3.0
powershell	ms-vscode	2019.11.0
prettify-json	mohsen1	0.0.3
Theme-MaterialKit	ms-vscode	0.1.4
useful-react-snippets	igorming	1.5.4
vsc-material-theme	Equinusocio	30.0.0
vscode-azureappservice	ms-azuretools	0.16.1
vscode-npm	fknop	3.3.0
vscode-npm-script	eg2	0.3.9
vscode-react-native	msjsdiag	0.13.1

[dombarnes]

Found it.

"omnisharp.useGlobalMono": "auto",
"omnisharp.monoPath": "/usr/local/Cellar/mono/6.4.0.198",

[filipw]

please update mono 5.2.0 to 6.4.0