Fatal error: Uncaught Error: Call to undefined function is_plugin_active() in D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-content\plugins\cmp-coming-soon-maintenance\inc\render\head-scripts.php:68 Stack trace: #0 D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-content\plugins\cmp-coming-soon-maintenance\inc\class-cmp-render_html.php(188): include() #1 D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-content\plugins\cmp-coming-soon-maintenance\themes\construct\construct-theme.php(57): CMP_Coming_Soon_and_Maintenance_Render_HTML->cmp_head_scripts() #2 D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-content\plugins\cmp-coming-soon-maintenance\niteo-cmp.php(909): require_once('D:\\appdata\\IIS\\...') #3 D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-includes\class-wp-hook.php(287): CMP_Coming_Soon_and_Maintenance->cmp_displayPage('') #4 D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #5 D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-includ in D:\appdata\IIS\vhosts\traumadokter.nl\httpdocs\wp-content\plugins\cmp-coming-soon-maintenance\inc\render\head-scripts.php on line 68