Fatal error: Uncaught Error: Call to undefined function create_function() in /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/deprecated/includes/widget.php:118
Stack trace:
#0 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/deprecated/ninja-forms.php(405): require_once()
#1 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/deprecated/ninja-forms.php(35): Ninja_Forms->includes()
#2 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/deprecated/ninja-forms.php(749): Ninja_Forms::instance()
#3 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/deprecated/ninja-forms.php(752): Ninja_Forms()
#4 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/ninja-forms.php(23): include('/usr/home/webar...')
#5 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-settings.php(254): include_once('/usr/home/webar...')
#6 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-config.php(92): require_once('/usr/home/webar...')
#7 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-load.php(37): require_once('/usr/home/webar...')
#8 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-blog-header.php(12): require_once('/usr/home/webar...')
#9 /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/index.php(17): require('/usr/home/webar...')
#10 {main}
  thrown in /usr/home/webartstudio/domains/webart-studio.com.pl/public_html/wp-content/plugins/ninja-forms/deprecated/includes/widget.php on line 118