Error message

• User warning: The following module is missing from the file system: iRecommend. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1128 of /var/www/ang/html/includes/bootstrap.inc).
• User warning: The following module is missing from the file system: opengraph_meta. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1128 of /var/www/ang/html/includes/bootstrap.inc).
• Notice: Trying to get property of non-object in block_block_view() (line 247 of /var/www/ang/html/modules/block/block.module).
• Notice: Trying to get property of non-object in block_block_view() (line 247 of /var/www/ang/html/modules/block/block.module).