Fatal error: Uncaught Error: Non-static method Hizzle\Noptin\Subscribers\Main::init() cannot be called statically in /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/build/autoload.php:20
Stack trace:
#0 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/vendor/composer/autoload_real.php(41): require()
#1 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/vendor/composer/autoload_real.php(45): {closure}('d6774e7ef10b855...', '/customers/4/f/...')
#2 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/vendor/autoload.php(25): ComposerAutoloaderInitd4095a2753c173a59c96834ab522bdaa::getLoader()
#3 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/noptin.php(280): require_once('/customers/4/f/...')
#4 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/noptin.php(254): Noptin->load_files()
#5 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/noptin.php(235): Noptin->__construct()
#6 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/noptin.php(564): Noptin::instance()
#7 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-settings.php(517): include_once('/customers/4/f/...')
#8 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-config.php(119): require_once('/customers/4/f/...')
#9 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-load.php(50): require_once('/customers/4/f/...')
#10 /customers/4/f/4/kostymbagaren.se/httpd.www/wp-blog-header.php(13): require_once('/customers/4/f/...')
#11 /customers/4/f/4/kostymbagaren.se/httpd.www/index.php(17): require('/customers/4/f/...')
#12 {main}
  thrown in /customers/4/f/4/kostymbagaren.se/httpd.www/wp-content/plugins/newsletter-optin-box/build/autoload.php on line 20