''NPM start' running on a strange URL after vscode crashed

My react app ran normally on the URL "http://localhost:3000" before vscode crashed (something about 'memory heap out'). After reopening vscode,

npm start

runs on the URL "http://localhost:3000/bryansomto/appName" and displays nothing. I tried editing the URL back to the previous working URL (that is, without /bryansomto/appName) from within the browser but the page still displays nothing.

Ps, no error is shown on the terminal from which I run npm start.

This is what my start script in package.json looked like before and after the issue.

"scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "server": "node-env-run server --exec nodemon | pino-colada",
    "dev": "run-p server start" },


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