I followed the documentation saying

Please follow the check list bellow to enable import function:

Need install and active plugin WordPress Importer
Need add define(‘WP_LOAD_IMPORTERS’, true); to file wp-config.php

But once I installed this plugin, and added line to wp-config.php, the button does not appear like shown in documentation.

I have changed the the upload limits.

Still Valen theme does not recognise the WordPress installer.

Copying the Valen skate file also not working.

Please advise, thanks