BEGIN:VCALENDAR
PRODID:-//eluceo/ical//2.0/EN
VERSION:2.0
CALSCALE:GREGORIAN
BEGIN:VEVENT
UID:f09802f69b5f9515fed4137743802693
DTSTAMP:20260415T221905Z
SUMMARY:dokKa - Kukata Miti
DTSTART;TZID=Europe/Berlin:20260514T200000
DTEND;TZID=Europe/Berlin:20260514T212000
END:VEVENT
END:VCALENDAR
<pre>An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /usr/www/users/dokka/v3/common/models/Termine.php on line 237. in /usr/www/users/dokka/v3/vendor/yiisoft/yii2/web/Response.php:368
Stack trace:
#0 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/web/Response.php(341): yii\web\Response-&gt;sendHeaders()
#1 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/web/ErrorHandler.php(138): yii\web\Response-&gt;send()
#2 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/base/ErrorHandler.php(151): yii\web\ErrorHandler-&gt;renderException()
#3 [internal function]: yii\base\ErrorHandler-&gt;handleException()
#4 {main}
Previous exception:
yii\web\HeadersAlreadySentException: Headers already sent in /usr/www/users/dokka/v3/common/models/Termine.php on line 237. in /usr/www/users/dokka/v3/vendor/yiisoft/yii2/web/Response.php:368
Stack trace:
#0 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/web/Response.php(341): yii\web\Response-&gt;sendHeaders()
#1 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/base/Application.php(666): yii\web\Response-&gt;send()
#2 /usr/www/users/dokka/v3/common/models/Termine.php(238): yii\base\Application-&gt;end()
#3 /usr/www/users/dokka/v3/frontend/controllers/ProgrammController.php(43): common\models\Termine-&gt;sendical()
#4 [internal function]: frontend\controllers\ProgrammController-&gt;actionIcal()
#5 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/base/InlineAction.php(66): call_user_func_array()
#6 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/base/Controller.php(197): yii\base\InlineAction-&gt;runWithParams()
#7 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/base/Module.php(554): yii\base\Controller-&gt;runAction()
#8 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/web/Application.php(112): yii\base\Module-&gt;runAction()
#9 /usr/www/users/dokka/v3/vendor/yiisoft/yii2/base/Application.php(391): yii\web\Application-&gt;handleRequest()
#10 /usr/www/users/dokka/v3/frontend/web/index.php(18): yii\base\Application-&gt;run()
#11 {main}</pre>