Vscode's code part can't show perfect, the code is black, there is not any other color

Question

VSCode Version: 1.51.1 Electron: 9.3.3 Chrome: 83.0.4103.122 Node.js: 12.14.1 V8: 8.3.110.13-electron.0 OS: Darwin x64 20.1.0 OS Version: macOS Big Sur 11.0.1 Steps to Repro