vscode-csharp: [MacOS] Cannot start OmniSharp because Mono version >=6.4.0 is required." after upgrade to latest vscode version(1.54.1)

My Unity3D project c# do not work after auto upgrade vscode 1.54.1 version today.
I have re-install latest mono(6.12) and dotnet core(3.1.4) but not work still. for detail:

• mono --version

Mono JIT compiler version 6.12.0.122 (2020-02/c621c35ffa0 Wed Feb 10 00:51:43 EST 2021)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           
	SIGSEGV:       altstack
	Notification:  kqueue
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug 
	Interpreter:   yes
	LLVM:          yes(610)
	Suspend:       hybrid
	GC:            sgen (concurrent by default)

• dotnet --info

.NET Core SDK (reflecting any global.json):
 Version:   3.1.406
 Commit:    f42e6b201a

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.12
 OS Platform: Darwin
 RID:         osx.10.12-x64
 Base Path:   /usr/local/share/dotnet/sdk/3.1.406/

Host (useful for support):
  Version: 3.1.12
  Commit:  0267ad09c6

.NET Core SDKs installed:
  2.1.4 [/usr/local/share/dotnet/sdk]
  2.1.301 [/usr/local/share/dotnet/sdk]
  3.1.301 [/usr/local/share/dotnet/sdk]
  3.1.406 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.12 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.0.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.12 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

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

other settings:

1. macos version: 10.12
2. “omnisharp.useGlobalMono”:“always”
3. “omnisharp.monoPath”: “/Library/Frameworks/Mono.framework/Versions/Current/Commands/mono”
4. .zshrc about mono

export MONO_HOME=/Library/Frameworks/Mono.framework/Versions/Current
export PATH=$PATH:$MONO_HOME/bin:$MONO_HOME/Commands

thanks.