Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, string given in /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/core/kalium-helpers.php:176
Stack trace:
#0 /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/core/kalium-helpers.php(176): array_merge('a:10:{i:0;s:27:...', Array)
#1 /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/kalium-main.php(168): Kalium_Helpers->isPluginActive('woocommerce/woo...')
#2 /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/kalium-main.php(139): Kalium->pluginsAreActive(Array)
#3 /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/kalium-main.php(502): Kalium::instance()
#4 /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/kalium-main.php(511): kalium()
#5 /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/functions.php(16): require_once('/customers/3/f/...')
#6 /customers/3/f/a/thetrain.nl/httpd.www/wp-settings.php(747): include('/customers/3/f/...')
#7 /customers/3/f/a/thetrain.nl/httpd.www/wp-config.php(108): require_once('/customers/3/f/...')
#8 /customers/3/f/a/thetrain.nl/httpd.www/wp-load.php(50): require_once('/customers/3/f/...')
#9 /customers/3/f/a/thetrain.nl/httpd.www/wp-blog-header.php(13): require_once('/customers/3/f/...')
#10 /customers/3/f/a/thetrain.nl/httpd.www/index.php(17): require('/customers/3/f/...')
#11 {main}
  thrown in /customers/3/f/a/thetrain.nl/httpd.www/wp-content/themes/kalium/inc/classes/core/kalium-helpers.php on line 176