Nothing Happens

Whoops! I didn’t remember posting about this 8 mos ago. Sorry.
https://www.ads-software.com/support/topic/upload-doesnt-happen

Didn’t have the error code on that post tho…

I dug deeper and found the solution. The problem is my server, it seems.

Check out this thread: https://www.ads-software.com/support/topic/fatal-error-class-domdocument-not-found?replies=11

In particular, taotiago’s replied solution worked like a charm. Here it is:

Replace in file parsers.php in plugin wordpress-importer at Class WXR_Parser_SimpleXML

$dom = new DOMDocument;
$old_value = null;
if ( function_exists( 'libxml_disable_entity_loader' ) ) {
$old_value = libxml_disable_entity_loader( true );
}
$success = $dom->loadXML( file_get_contents( $file ) );
if ( ! is_null( $old_value ) ) {
libxml_disable_entity_loader( $old_value );
}

if ( ! $success || isset( $dom->doctype ) ) {
return new WP_Error( 'SimpleXML_parse_error', __( 'There was an error when reading this WXR file', 'wordpress-importer' ), libxml_get_errors() );
}

$xml = simplexml_import_dom( $dom );
unset( $dom );

For:
$xml = simplexml_load_file($file);

I suspect this is the same problem I encountered. Finally found a solution – https://www.michoscopic.com/solved-wordpress-importer-not-working/