Frequently Asked Question
If the import process hangs with this error message "There has been a critical error on your website." without any other details, you should add the following lines in the wp-config.php file to get more details about this error.
define( 'WP_DEBUG_LOG', true ); define( 'WP_DEBUG_DISPLAY', true );
Then restart the import. The next time it hangs, you will get more details in the logs.
Don't forget to remove these lines once your WordPress site is released on your production server.