Hello,
which version are you using? It looks that it missing table, which should be added during upgrade to at least 2.0.1:
/**
* 2.0.1 Upgrade Code
*/
class ips_plugins_setup_upg_20001
{
/**
* ...
*
* @return array If returns TRUE, upgrader will proceed to next step. If it returns any other value, it will set this as the value of the 'extra' GET parameter and rerun this step (useful for loops)
*/
public function step1()
{
/* Do we have table? */
if( ! \IPS\DB::i()->checkForTable( 'dp4disableindexing_settings' ) )
{
/* No? Add it! */
\IPS\Db::i()->createTable( array(
'name' => 'dp4disableindexing_settings',
Or maybe you tried install it?
I'm checking it anyway.