ERROR after changing to Desired Currency

Hi,

I have installed the free version of the plugin. Whenever I am changing my base currency (GBP) to PKR the page displays the following error:

Warning: str_repeat(): Second argument has to be greater than or equal to 0 in /homepages/39/d758981701/htdocs/clickandbuilds/OlioShoppe/wp-content/plugins/woocommerce-currency-switcher/classes/woocs_after_33.php on line 2736

Please have a look. I hope its not a big issue.

Regards,

The page I need help with: [log in to see the link]