- Add dataType: 'json' to AJAX call to properly parse JSON response - Add Content-Type header to upload_profile_picture.php - Add error callback with console logging for debugging - Remove manual JSON parsing since jQuery handles it with dataType
- account_settings.php: Show success message before reloading page (with 1.5s delay) - upload_profile_picture.php: Reorder require statements for proper initialization, add file error code to error message