At the time of installation you may got message like “Import failed,” . in that case it means your server PHP configuration limits made the problem. You should contact your hosting provide and asked them to increase those limits to a minimum as follows.
- max_execution_time 900
- memory_limit 128M
- post_max_size 32M
- upload_max_filesize 32M
You can verify your PHP configuaration limits by installing a simple plugin found https://wordpress.org/plugins/wordpress-php-info/ . You can also check your PHP errro logs to see the exact error .