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Keymaster
Hi Rod,
We have fixed this problem, the fix will be available in the next release.
Until then, you can delete the following lines from wct-admin-page.php file, from sanitize function:
if( !is_numeric( $input['id_number'] ) )
$input['id_number'] = '';
if( !empty( $input['title'] ) )
$input['title'] = sanitize_text_field( $input['title'] );
Peter