Fatal error: PHP warning in file /www/htdocs/w010ba08/RSV/wcf/lib/util/HeaderUtil.class.php (98): Cannot modify header information - headers already sent by (output started at /www/htdocs/w010ba08/RSV/options.inc.php:1)

Information:

error message: PHP warning in file /www/htdocs/w010ba08/RSV/wcf/lib/util/HeaderUtil.class.php (98): Cannot modify header information - headers already sent by (output started at /www/htdocs/w010ba08/RSV/options.inc.php:1)
error code: 0
file: /www/htdocs/w010ba08/RSV/wcf/lib/system/WCF.class.php (281)
php version: 5.6.40-nmm10
wcf version: 1.1.10 pl 2 (Tempest)
date: Tue, 30 Dec 2025 09:42:50 +0000
request: /index.php?action=lastPost&page=Thread&threadID=959
referer:

Stacktrace:

#0 [internal function]: WCF::handleError(2, 'Cannot modify h...', '/www/htdocs/w01...', 98, Array)
#1 /www/htdocs/w010ba08/RSV/wcf/lib/util/HeaderUtil.class.php(98): header('Location: https...')
#2 /www/htdocs/w010ba08/RSV/lib/page/ThreadPage.class.php(190): HeaderUtil::redirect('index.php?page=...', true, true)
#3 /www/htdocs/w010ba08/RSV/lib/page/ThreadPage.class.php(97): ThreadPage->goToLastPost()
#4 /www/htdocs/w010ba08/RSV/wcf/lib/page/AbstractPage.class.php(45): ThreadPage->readParameters()
#5 /www/htdocs/w010ba08/RSV/wcf/lib/util/RequestHandler.class.php(64): AbstractPage->__construct()
#6 /www/htdocs/w010ba08/RSV/wcf/lib/util/RequestHandler.class.php(92): RequestHandler->__construct('Thread', Array, 'page')
#7 /www/htdocs/w010ba08/RSV/index.php(8): RequestHandler::handle(Array)
#8 {main}