TYPO3 Core

PHP Warning: Undefined array key "file" in /var/www/html/typo3/sysext/frontend/Classes/Typolink/FileOrFolderLinkBuilder.php line 34, in file /var/www/html/typo3/sysext/core/Classes/Error/ErrorHandler.php:145 - 

Stack trace:
#0 /var/www/html/typo3/sysext/frontend/Classes/Typolink/FileOrFolderLinkBuilder.php(34): TYPO3\\CMS\\Core\\Error\\ErrorHandler->handleError(2, 'Undefined array...', '/var/www/html/t...', 34)
#1 /var/www/html/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(4745): TYPO3\\CMS\\Frontend\\Typolink\\FileOrFolderLinkBuilder->build(Array, 'wefwefewfewf', '', Array)
#2 /var/www/html/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(2310): TYPO3\\CMS\\Frontend\\ContentObject\\ContentObjectRenderer->typoLink('wefwefewfewf', Array)
#3 /var/www/html/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(1339): TYPO3\\CMS\\Frontend\\ContentObject\\ContentObjectRenderer->stdWrap_typolink('wefwefewfewf', Array)
#4 /var/www/html/typo3/sysext/frontend/Classes/ContentObject/TextContentObject.php(44): TYPO3\\CMS\\Frontend\\ContentObject\\ContentObjectRenderer->stdWrap('wefwefewfewf', Array)
#5 /var/www/html/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(798): TYPO3\\CMS\\Frontend\\ContentObject\\TextContentObject->render(Array)
...