Not sure I understand your issue, but this error is not "file does not exist" error. This is an error 500, which means there is an issue with your server action.
Check this please: Debugging Server Connect Errors
Not sure I understand your issue, but this error is not "file does not exist" error. This is an error 500, which means there is an issue with your server action.
Check this please: Debugging Server Connect Errors