Getting 404 when trying to make POST request from React frontend to Flask backend

json reactjs flask post http-status-code-404

Looks like issue with your url

const url = 'https://cors-anywhere.herokuapp.com/http://localhost:5000/memes';

I do not believe that this is a valid url format

maybe you need to use as url:https://cors-anywhere.herokuapp.com/memesorhttp://localhost:5000/memes