Hi,
We have noticed the same issue, this seems to only affect sites where ‘data-widget-id’ is used…
Using [trustindex no-registration=google] works fine on 12.4, however we have two widgets setup so when using [trustindex data-widget-id=xxxxxxxxx] this causes the site to break.
PHP message: PHP Fatal error: Uncaught Error: Call to a member function renderWidgetFrontend() on null in /var/www/vhosts/xxxx/httpdocs/wp-content/plugins/wp-reviews-plugin-for-google/trustindex-plugin.class.php:772\nStack trace:\n#0 /var/www/vhosts/xxxx/httpdocs/wp-includes/shortcodes.php(434): TrustindexPlugin_google->shortcode_func()\n#1 [internal function]:
Rolling back to an earlier version 12.2 for now resolves the issue. Hope this helps narrow down the issue.