Fatal error: Call to undefined function entityreference_get_behavior_handlers()

Warning message

JQuery Cycle must be installed in order to run the slideshow. Please go to Status Report for instructions.

This is the error due to entity reference module. Please apply the patch https://drupal.org/files/entityreference-1459540-47-workaround-fatal-error.patch and then run the update.php i.e
yourwebsite.com/update.php to solve this problem.