failed to open http://localhost:3000/

The open page prompts for such an error

Failed to compile

./node_modules/vscode-base-languageclient/lib/client.js
Module not found: Can't resolve 'vscode' in 'C:\Users\su\Desktop\appp\node_modules\vscode-base-languageclient\lib'

This error occurred during the build time and cannot be dismissed.