Error Element Browser TYPO3 6.0

Warning: rtrim() expects parameter 1 to be string, object given in /path/to/software/typo3_src-6.0.0/typo3/sysext/recordlist/Classes/Browser/ElementBrowser.php on line 1867

Warning: ArrayIterator::seek() expects parameter 1 to be long, string given in /path/to/software/typo3_src-6.0.0/typo3/sysext/core/Classes/Resource/Driver/LocalDriver.php on line 312