I have asked the server devs to look at this as well and they state the following
Having checked the error logs on the site, it looks like there are a lot of issues with the website.
In here we can see that there is depreciated code for not only some modules required for Joomla to function, but specifically the template. I’ve supplied some examples of these below:
[08-Mar-2024 16:40:49 UTC] PHP Warning: Undefined variable $row in /home/ohx/public_html/o-hx/templates/ja_prodex/html/com_content/featured/default.php on line 72
[08-Mar-2024 16:40:49 UTC] PHP Warning: Undefined variable $rowcount in /home/ohx/public_html/o-hx/templates/ja_prodex/html/com_content/featured/default.php on line 74
[08-Mar-2024 16:40:50 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /home/ohx/public_html/o-hx/modules/mod_lgx_logoslider/mod_lgx_logoslider.php on line 18
[08-Mar-2024 16:40:50 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/ohx/public_html/o-hx/modules/mod_lgx_logoslider/mod_lgx_logoslider.php on line 43
What this usually means is that the website’s modules, theme, applications or plugins are attempting to use PHP that has been depreciated according to the current PHP version in use by the site.