« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ad') ? 1 '' at line 1 »
      SQL: SELECT snippet FROM redomeuk_eat_dont_hula.`redo_site_snippets` WHERE redomeuk_eat_dont_hula.`redo_site_snippets`.name='phx: orb.fig('ad') ? 1 ';
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Parser timing
  MySQL: 0.0581 s(27 Requests)
  PHP: 1.1970 s 
  Total: 1.2551 s