Fatal error: Uncaught TYPO3\CMS\Core\Cache\Exception\NoSuchCacheException: A cache with identifier "assets" does not exist. in /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Cache/CacheManager.php:137 Stack trace: #0 /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Imaging/IconRegistry.php(575): TYPO3\CMS\Core\Cache\CacheManager->getCache('assets') #1 /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Imaging/IconRegistry.php(549): TYPO3\CMS\Core\Imaging\IconRegistry->getCachedBackendIcons() #2 /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Imaging/IconRegistry.php(529): TYPO3\CMS\Core\Imaging\IconRegistry->initialize() #3 /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Utility/GeneralUtility.php(3667): TYPO3\CMS\Core\Imaging\IconRegistry->__construct() #4 /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Imaging/IconFa in /var/www/vhosts/staging/httpdocs/releases/20190607135208/typo3/sysext/core/Classes/Cache/CacheManager.php on line 137