My php  version is php 8.1.10 and  invision 7.4 and today  morning  I am receving the error in Forum  area,

Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /home/ddcforum/public_html/uploads/template_10_77e511f3f597b974567a95c3a1860bbf_plugins.php on line 3289

You have an outdated plugin, not compatible with PHP 8.0/8.1. I would suggest to disable all of them and then enable one by one and testing to find out who is the culprit. 

This ^ 🙂 

Here are the plugins  which are  giving me errors

1). smoothscroller,
2). phptxtwidget, 
3). generalstatistics, 
4). topicviewedbyusers, 
5). websitefooter, 
6). bim40topicthumbnail, 
7). generalstatistics, 
8). messageonsignupform


But Urgently I need the replacement of   phptxtwidget and  generalstatistics for now

You would need to contact the author of those plugins for a resolution