« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: Invalid argument supplied for foreach() 
  Error type/ Nr.: Warning - 2 
  File: /home/theduchessyork.co.uk/htdocs/assets/snippets/listings/listing-detail.inc.php 
  Line: 274 
  Line 274 source: foreach ($acts as $act) {  
 
Parser timing
  MySQL: 0.0022 s(4 Requests)
  PHP: 0.0229 s 
  Total: 0.0251 s