An uncaught (in promise) error is an error that occurs when a promise is rejected, but no error handler is attached to the promise. This can happen if the promise is created in a scope where there is no catch handler, or if the promise is rejected in a way that is not caught by a catch handler. The most common cause of an uncaught (in promise) error is a failed AJAX request. When an AJAX request fails, the promise is rejected, but there is no way to handle the error, so it remains uncaught.
- Check the status code of the error and see if it is a 500 error
 - If it is a 500 error, then check the request headers and see if there is a problem with the headers
 - If the headers are fine, then check the request body and see if there is a problem with the body
 - If the body is fine, then check the response headers and see if there is a problem with the headers
 - If the headers are fine, then check the response body and see if there is a problem with the body
 
1. Check the status code of the error and see if it is a 500 error
- Open your browser and navigate to the URL that you were trying to access when you encountered the error.
 - In the address bar, type "status code 500".
 - If you receive a page that looks like the following, it means that your request failed with a status code of 500. HTTP/1.1 500 Internal Server Error
 - If the status code that you received is not 500, then there is likely a problem with your web browser or your connection and you will need to troubleshoot it.
 
2. If it is a 500 error, then check the request headers and see if there is a problem with the headers
1.Check the request headers. 2.If there is a problem with the headers, then fix it. 3.If the header problem is not fixed, then the request may have failed due to a problem with the request.
3. If the headers are fine, then check the request body and see if there is a problem with the body
- Verify that the headers are correct
 - Verify that the request body is correct
 - If the request body is correct, then fix the uncaught (in promise) error.
 
4. If the body is fine, then check the response headers and see if there is a problem with the headers
If the body is fine, then check the response headers and see if there is a problem with the headers in order to fix uncaught (in promise) error:
- Open the response in a text editor.
 - Look for the HTTP status code.
 - If the status code is 500, then there is a problem with the headers. Fix the headers and try again.
 
5. If the headers are fine, then check the response body and see if there is a problem with the body
- Check the headers to make sure that they are okay.
 - Check the response body to see if there is a problem.
 
