ErrorException:
session_start(): Session cannot be started after headers have already been sent

  at /home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-content/themes/vilkmerges/app/setup.php:258
  at Illuminate\Foundation\Bootstrap\HandleExceptions->handleError()
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-content/themes/vilkmerges/vendor/roots/acorn/src/Roots/Acorn/Bootstrap/HandleExceptions.php:54)
  at Roots\Acorn\Bootstrap\HandleExceptions->handleError()
  at session_start()
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-content/themes/vilkmerges/app/setup.php:258)
  at App\{closure}()
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-includes/class-wp-hook.php:307)
  at WP_Hook->apply_filters()
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-includes/class-wp-hook.php:331)
  at WP_Hook->do_action()
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-includes/plugin.php:476)
  at do_action()
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-settings.php:598)
  at require_once('/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-settings.php')
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-config.php:100)
  at require_once('/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-config.php')
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-load.php:50)
  at require_once('/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-load.php')
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-blog-header.php:13)
  at require('/home/ato/domains/vilkmerges.git-ato.eu/public_html/wp-blog-header.php')
     (/home/ato/domains/vilkmerges.git-ato.eu/public_html/index.php:17)