reactjs – Cross Origin 403 – No Acces-Controll-Allow-Origin – Failed to fetch

I can’t get any further. As soon as I try to fill out the form in the React frontend via the “FireFox” browser, the Origin cannot take “localhost:3000” to localhost:8080. I get error 403. Cross origin request is blocked. Despite “Access-Controll-Allow-Origin on *this message comes up. In Postman Software I can get 200 OK on … Read more