Slim Application Error

The application could not run because of the following error:

Details

Type: Twig_Error_Runtime
Message: An exception has been thrown during the rendering of a template ("shuffle() expects parameter 1 to be array, null given") in "visit/familyvisits.html.twig" at line 14.
File: /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Template.php
Line: 148

Trace

#0 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Environment.php(331) : eval()'d code(63): Twig_Template->displayBlock('content', Array, Array)
#1 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Template.php(278): __TwigTemplate_e9634b83da66dcdef768fefc672cd0b4b985bca866ed8e5a200650377b9d98dc->doDisplay(Array, Array)
#2 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Template.php(252): Twig_Template->displayWithErrorHandling(Array, Array)
#3 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Environment.php(331) : eval()'d code(25): Twig_Template->display(Array, Array)
#4 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Template.php(278): __TwigTemplate_689641f3a686e612d307c074ff04786fd2e053c21f8c46ed0bb99c95a8944a23->doDisplay(Array, Array)
#5 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Template.php(252): Twig_Template->displayWithErrorHandling(Array, Array)
#6 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Template.php(263): Twig_Template->display(Array)
#7 /var/www/vhosts/folkartmuseum.org/beta/vendor/twig/twig/lib/Twig/Environment.php(292): Twig_Template->render(Array)
#8 /var/www/vhosts/folkartmuseum.org/beta/app/routes.php(305): Twig_Environment->render('visit/familyvis...', Array)
#9 [internal function]: {closure}('family-visits')
#10 /var/www/vhosts/folkartmuseum.org/beta/vendor/slim/slim/Slim/Route.php(462): call_user_func_array(Object(Closure), Array)
#11 /var/www/vhosts/folkartmuseum.org/beta/vendor/slim/slim/Slim/Slim.php(1326): Slim\Route->dispatch()
#12 /var/www/vhosts/folkartmuseum.org/beta/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#13 /var/www/vhosts/folkartmuseum.org/beta/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#14 /var/www/vhosts/folkartmuseum.org/beta/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#15 /var/www/vhosts/folkartmuseum.org/beta/vendor/slim/slim/Slim/Slim.php(1271): Slim\Middleware\PrettyExceptions->call()
#16 /var/www/vhosts/folkartmuseum.org/httpdocs/index.php(51): Slim\Slim->run()
#17 {main}