Error message

• Notice: Undefined index: und in lotus_notes_block_content() (line 13 of /var/www/wan-ifra/events.wan-ifra.org/htdocs/drupal-7.x/sites/all/modules/custom/lotus_notes/includes/lotus_notes.block.inc).
• Notice: Trying to get property of non-object in lotus_notes_block_content() (line 24 of /var/www/wan-ifra/events.wan-ifra.org/htdocs/drupal-7.x/sites/all/modules/custom/lotus_notes/includes/lotus_notes.block.inc).
• Notice: Trying to get property of non-object in lotus_notes_block_content() (line 25 of /var/www/wan-ifra/events.wan-ifra.org/htdocs/drupal-7.x/sites/all/modules/custom/lotus_notes/includes/lotus_notes.block.inc).