Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'

What went wrong?

The origin making the request does not match the origin permitted by the Access-Control-Allow-Origin header. This error can also occur if the response includes more than one Access-Control-Allow-Origin header.

If the service your code is accessing uses a CORS request under your control, make sure it is configured to include your origin in its Access-Control-Allow-Origin header. In addition, confirm that only one such header is included in responses, and that it includes only a single origin.

For example, in Apache, add a line such as the following to the server's configuration (within the appropriate <Directory>, <Location>, <Files>, or <VirtualHost> section). The configuration is typically found in a .conf file (httpd.conf and apache.conf are common names for these), or in an .htaccess file.

Header set Access-Control-Allow-Origin 'origin'

For Nginx, the command to set up this header is:

add_header 'Access-Control-Allow-Origin' 'origin'

See also

• CORS errors
• Glossary: CORS
• CORS introduction
• Enable CORS: I want to add CORS support to my server