FastCGI Error in PHP

[GD-L]

On launching Docker container, logs throw:

2023/02/06 14:59:41 [error] 1584#1584: *3 FastCGI sent in stderr: "PHP message: PHP Warning:  Trying to access array offset on value of type bool in /usr/share/webapps/rutorrent/plugins/autodl-irssi/getConf.php 
on line 54PHP message: PHP Warning:  Trying to access array offset on value of type bool in /usr/share/webapps/rutorrent/plugins/autodl-irssi/getConf.php on line 61" 
while reading response header from upstream, client: 192.168.1.15, server: localhost, 
request: "GET /plugins/autodl-irssi/getfile.php?file=HQBits.tracker&_=1675713546412 HTTP/1.1", 
upstream: "fastcgi://127.0.0.1:7777", host: "192.168.1.198:9080", referrer: "http://192.168.1.198:9080/"

I haven't made any changes other than updating the container.