this old react version for fixing hot reloading that you should copy those instad of current version and del nodeModule and npm install again :
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.3",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-scripts": "4.0.0",
.env file in the root FAST_REFRESH=FALSE
dev-4p0ti3wa
Main Docs https://auth0.com/
1-Create Application
2-Choose : Single Page Web Applications
3-Choose : React
4-Go to Settings Tab
5-Copy/Paste Domain, ClientID - can be public (or use .env)
6-Add Domain - for now http://localhost:3000 (DON'T COPY PASTE FROM URL BAR)
Allowed Callback URLs Allowed Logout URLs Allowed Web Origins 7-SAVE CHANGES!!!!!!!!!!!!!!!
8-Authentication email,social
9-React SDK Docs https://auth0.com/docs/libraries/auth0-react
10-REACT SDK API Docs https://auth0.github.io/auth0-react/