Fatal error: PHP error in file /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/util/StringUtil.class.php (426): Array and string offset access syntax with curly braces is deprecated

Information:

error message: PHP error in file /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/util/StringUtil.class.php (426): Array and string offset access syntax with curly braces is deprecated
error code: 0
file: /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/system/WCF.class.php (281)
php version: 7.4.33
wcf version: 1.1.9 (Tempest)
date: Thu, 18 Apr 2024 16:26:03 +0000
request: /upload/index.php?page=TaggedObjects&tagID=166&s=8a1a7e9a22dbf66b623b10d2a74ed1a235b62bb7
referer:

Stacktrace:

#0 /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/core.functions.php(31): WCF::handleError()
#1 /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/core.functions.php(31): require_once()
#2 /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/system/cache/CacheHandler.class.php(73): __autoload()
#3 /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/system/WCF.class.php(311): CacheHandler->addResource()
#4 /mnt/web421/e1/65/53462165/htdocs/upload/lib/system/WBBCore.class.php(81): WCF->loadDefaultCacheResources()
#5 /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/system/WCF.class.php(304): WBBCore->loadDefaultCacheResources()
#6 /mnt/web421/e1/65/53462165/htdocs/upload/wcf/lib/system/WCF.class.php(97): WCF->initCache()
#7 /mnt/web421/e1/65/53462165/htdocs/upload/global.php(18): WCF->__construct()
#8 /mnt/web421/e1/65/53462165/htdocs/upload/index.php(7): require_once('/mnt/web421/e1/...')
#9 {main}