Argument 6 ($secure) is NULL of type null but \setcookie() takes bool https://www.php.net/manual/ru/function.setcookie.php
RTBC
1.6
Code
The issue particularly affects sites running on PHP version 8.0.0 or later.
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
Tested this patch and it works. Changing this to RTBC.