The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. · Issue #624 · rails/webpacker · GitHub
![ruby on rails - No 'Access-Control-Allow-Origin' header is present on the requested resource. Google Font - Stack Overflow ruby on rails - No 'Access-Control-Allow-Origin' header is present on the requested resource. Google Font - Stack Overflow](https://i.stack.imgur.com/ymk6L.png)
ruby on rails - No 'Access-Control-Allow-Origin' header is present on the requested resource. Google Font - Stack Overflow
![The 'Access-Control-Allow-Origin' header contains multiple values (Indirect Application Server Conflict) · Issue #162 · cyu/rack-cors · GitHub The 'Access-Control-Allow-Origin' header contains multiple values (Indirect Application Server Conflict) · Issue #162 · cyu/rack-cors · GitHub](https://user-images.githubusercontent.com/4403594/38075859-6b756942-3351-11e8-9655-b16674c720eb.png)
The 'Access-Control-Allow-Origin' header contains multiple values (Indirect Application Server Conflict) · Issue #162 · cyu/rack-cors · GitHub
![reactjs - How to fix 'Access-Control-Allow-Origin' errors when fetching from Rails API - Stack Overflow reactjs - How to fix 'Access-Control-Allow-Origin' errors when fetching from Rails API - Stack Overflow](https://i.stack.imgur.com/ES2hc.png)