Line 16 has:
$InsertQuery->bindColumn("advertiserID", "i", ".$_SESSION['WADA_Insert_advertisers'] .", "WA_BLANK");
it should be:
$InsertQuery->bindColumn("advertiserID", "i", "".$_SESSION['WADA_Insert_advertisers'] ."", "WA_BLANK");
Make sure you have downloaded and installed the latest version (reinstall the extension). I think this may have been an issue in a previous version that has been corrected.