We weren't able to successfully make a request to . The HTTP error returned was .
This is likely because of a Cross-site HTTP request and your server not having the appropriate Access-Control-Allow-Origin and Access-Control-Allow-Methods headers.
Adding the following response headers to OPTION requests sent to should solve the problem:
Access-Control-Allow-Origin:
Access-Control-Allow-Methods: POST, PUT, DELETE, HEAD, PATCH, OPTIONS