R_MODE', 1); ?> Fatal error: PHP warning in file /usr/www/users/herbert/wbb2/wcf/lib/util/HeaderUtil.class.php (98): Cannot modify header information - headers already sent by (output started at /usr/www/users/herbert/wbb2/options.inc.php:128944)

Fatal error: PHP warning in file /usr/www/users/herbert/wbb2/wcf/lib/util/HeaderUtil.class.php (98): Cannot modify header information - headers already sent by (output started at /usr/www/users/herbert/wbb2/options.inc.php:128944)

Information:

error message: PHP warning in file /usr/www/users/herbert/wbb2/wcf/lib/util/HeaderUtil.class.php (98): Cannot modify header information - headers already sent by (output started at /usr/www/users/herbert/wbb2/options.inc.php:128944)
error code: 0
file: /usr/www/users/herbert/wbb2/wcf/lib/system/WCF.class.php (281)
php version: 5.6.36
wcf version: 1.1.10 pl 2 (Tempest)
date: Tue, 17 Jul 2018 09:24:49 +0000
request: /wbb2/index.php?form=Search&action=unread&s=6c57500afd11a444bf421e8edbf6da4a87744120
referer:

Stacktrace:

#0 [internal function]: WCF::handleError(2, 'Cannot modify h...', '/usr/www/users/...', 98, Array)
#1 /usr/www/users/herbert/wbb2/wcf/lib/util/HeaderUtil.class.php(98): header('Location: http:...')
#2 /usr/www/users/herbert/wbb2/lib/system/event/listener/ExtendedSearchFormListener.class.php(142): HeaderUtil::redirect('index.php?form=...')
#3 /usr/www/users/herbert/wbb2/wcf/lib/system/event/EventHandler.class.php(207): ExtendedSearchFormListener->execute(Object(SearchForm), 'SearchForm', 'readParameters')
#4 /usr/www/users/herbert/wbb2/wcf/lib/page/AbstractPage.class.php(54): EventHandler::fireAction(Object(SearchForm), 'readParameters')
#5 /usr/www/users/herbert/wbb2/wcf/lib/form/CaptchaForm.class.php(49): AbstractPage->readParameters()
#6 /usr/www/users/herbert/wbb2/wcf/lib/form/SearchForm.class.php(119): CaptchaForm->readParameters()
#7 /usr/www/users/herbert/wbb2/wcf/lib/page/AbstractPage.class.php(45): SearchForm->readParameters()
#8 /usr/www/users/herbert/wbb2/wcf/lib/util/RequestHandler.class.php(64): AbstractPage->__construct()
#9 /usr/www/users/herbert/wbb2/wcf/lib/util/RequestHandler.class.php(95): RequestHandler->__construct('Search', Array, 'form')
#10 /usr/www/users/herbert/wbb2/index.php(8): RequestHandler::handle(Array)
#11 {main}