[Plugin: WordPress Importer] Importer not working

Attempting to migrate from wordpress.com to wordpress.org site. When importing, it brings in categories, tags, a single comment (among dozens), but no posts or themes. When I try running it again, I get to a blank screen. I tried to enable error logging, using the following code, but nothing gets written to debug.log:

/**
* This will log all errors notices and warnings to a file called debug.log in
* wp-content (if Apache does not have write permission, you may need to create
* the file first and set the appropriate permissions (i.e. use 666) )
*/
define(‘WP_DEBUG’, true);
define(‘WP_DEBUG_LOG’, true);
define(‘WP_DEBUG_DISPLAY’, false);
@ini_set(‘display_errors’,0);