Error message

• User warning: The following module is missing from the file system: link. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1181 of /data/seminar/public_html/includes/bootstrap.inc).
• Deprecated function: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in include_once() (line 1439 of /data/seminar/public_html/includes/bootstrap.inc).
• Warning: Illegal string offset 'subject' in jquery_countdown_timer_block_view() (line 78 of /data/seminar/public_html/sites/all/modules/jquery_countdown_timer/jquery_countdown_timer.module).
• Warning: Illegal string offset 'content' in jquery_countdown_timer_block_view() (line 79 of /data/seminar/public_html/sites/all/modules/jquery_countdown_timer/jquery_countdown_timer.module).