求解，upstream: "fastcgi://unix:/tmp/php-cgi-74.sock:",

面板网站错误日志中一直有这个，求解，
在别的服务器环境中未见到此提示，是我哪里配置错了？


2021/05/18 21:50:04[error] 847753#0: *10691 FastCGI sent in stderr: "PHP message: PHP Deprecated:  Array and string offset access syntax with curly braces is deprecated in /www/wwwroot/xxxxx.com/app/common.php on line 313PHP message: PHP Deprecated:  The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence in /www/wwwroot/xxxxx.com/app/common.php on line 1430" while reading response header from upstream, client: 86.59.35.162, server: xxxx.com, request: "GET /preseed.cfg HTTP/1.1", upstream: "fastcgi://unix:/tmp/php-cgi-74.sock:", host: "152.136.204.xxx"