Error message

• User warning: The following module is missing from the file system: uc_volume_pricing. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1181 of /home2/zenitjtk/public_html/includes/bootstrap.inc).
• Warning: Undefined array key "field_product_category_tid" in eval() (line 1 of /home2/zenitjtk/public_html/sites/all/modules/views/plugins/views_plugin_argument_default_php.inc(66) : eval()'d code).