『nodemon』Reactで開発中にnpm startできなくなった。

reactで開発中にターミナル上に以下の表示が出て、立ち上げができなくなりました。
よろしくお願いします.

[nodemon] 2.0.4

[nodemon] to restart at any time, enter rs
[nodemon] watching path(s): .
[nodemon] watching extensions: js,mjs,json
[nodemon] starting node App.js main.js
[nodemon] clean exit - waiting for changes before restart

package.jsonを載せておきます。

{

"name": "face",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.11.4",
"@testing-library/react": "^11.1.0",
"@testing-library/user-event": "^12.1.10",
"@types/classnames": "^2.2.11",
"@types/jest": "^26.0.15",
"@types/node": "^12.0.0",
"@types/react": "^16.9.53",
"@types/react-dom": "^16.9.8",
"classnames": "^2.2.6",
"node-sass": "^4.14.1",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-scripts": "4.0.1",
"typescript": "^4.0.3",
"web-vitals": "^0.2.4"
},
"scripts": {
"start": "react-scripts start node app",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"watch": "nodemon app"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}