What role does CORS (Cross-Origin Resource Sharing) play in 500 errors with AJAX?

CORS can sometimes cause 500 errors, especially if the server is not properly configured to allow requests from the client's origin. If the client's origin is not allowed in the server's CORS configuration, the server might return a 500 error indicating that it cannot fulfill the request due to CORS restrictions. This often happens when the client is making requests to a different domain than the server is configured to accept.