One: You may have entered the wrong directory
It must be the innermost directory to take effect, otherwise it may prompt:
At this time, close the project, find the correct path and open it again
Two: If the path is correct
You can try to delete the local node_modules folder, and then npm install again
Three: maybe you don't have node.js installed
This is the official website to connect to Node.js (nodejs.org)
This is the Chinese website download link download | Node.js Chinese website (nodejs.cn)