The 'Access-Control-Allow-Origin' header has a value 'http://localhost:4200' that is not equal to the supplied origin

Question

(continuation of error message in title) \" Origin \'http://127.0.0.1:4200\' is therefore not allowed access.\"

I am unable to run the same Angular 5 site on two dif

Answer 1

You may have installed HTTPS Everywhere extension. Make sure you Disable HTTPS Everywhere on Localhost. That's what was causing me this problem.