Hi Nicolas,
reading the error message I changed the popup.php (administrator/components/com_hikashop/helpers/popup.php on line 296 from
return $this->imageMootools$content, $url, $id, $attr, $params); to
return $this->imageShadowbox($content, $url, $id, $attr, $params);
and replaced the file via ftp.
After that the configuration page figures normal with all submenu items. The image popup modus menu look like the screenshot attached.
I know that isn't the best way, because after an update from Hikashop the bug will be there again. But unfortunately I am not a programmer.
I'm happy to see the page but have you an idea to fix it right?
Best regards,
Jonas